diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog
index b995ce4..63015bb 100644
--- a/Source/JavaScriptCore/ChangeLog
+++ b/Source/JavaScriptCore/ChangeLog
@@ -1,3 +1,16 @@
+2020-04-01  Keith Miller  <keith_miller@apple.com>
+
+        Bindings that override getOwnPropertySlotByIndex need to say they MayHaveIndexedAccessors
+        https://bugs.webkit.org/show_bug.cgi?id=209762
+
+        Reviewed by Darin Adler.
+
+        Change indexingType to indexingModeIncludingHistory to more
+        clearly indicate the expected range of possible valid values.
+
+        * runtime/StructureInlines.h:
+        (JSC::Structure::create):
+
 2020-03-31  Yusuke Suzuki  <ysuzuki@apple.com>
 
         [JSC] Introduce UCPUStrictInt32 for result type of DFG operations
diff --git a/Source/JavaScriptCore/runtime/StructureInlines.h b/Source/JavaScriptCore/runtime/StructureInlines.h
index fb276d8..24b2a69 100644
--- a/Source/JavaScriptCore/runtime/StructureInlines.h
+++ b/Source/JavaScriptCore/runtime/StructureInlines.h
@@ -36,16 +36,16 @@
 
 namespace JSC {
 
-inline Structure* Structure::create(VM& vm, JSGlobalObject* globalObject, JSValue prototype, const TypeInfo& typeInfo, const ClassInfo* classInfo, IndexingType indexingType, unsigned inlineCapacity)
+inline Structure* Structure::create(VM& vm, JSGlobalObject* globalObject, JSValue prototype, const TypeInfo& typeInfo, const ClassInfo* classInfo, IndexingType indexingModeIncludingHistory, unsigned inlineCapacity)
 {
     ASSERT(vm.structureStructure);
     ASSERT(classInfo);
     if (auto* object = prototype.getObject()) {
-        ASSERT(!object->anyObjectInChainMayInterceptIndexedAccesses(vm) || hasSlowPutArrayStorage(indexingType) || !hasIndexedProperties(indexingType));
+        ASSERT(!object->anyObjectInChainMayInterceptIndexedAccesses(vm) || hasSlowPutArrayStorage(indexingModeIncludingHistory) || !hasIndexedProperties(indexingModeIncludingHistory));
         object->didBecomePrototype();
     }
 
-    Structure* structure = new (NotNull, allocateCell<Structure>(vm.heap)) Structure(vm, globalObject, prototype, typeInfo, classInfo, indexingType, inlineCapacity);
+    Structure* structure = new (NotNull, allocateCell<Structure>(vm.heap)) Structure(vm, globalObject, prototype, typeInfo, classInfo, indexingModeIncludingHistory, inlineCapacity);
     structure->finishCreation(vm);
     return structure;
 }
diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
index 5180137..1b64187 100644
--- a/Source/WebCore/ChangeLog
+++ b/Source/WebCore/ChangeLog
@@ -1,3 +1,146 @@
+2020-04-01  Keith Miller  <keith_miller@apple.com>
+
+        Bindings that override getOwnPropertySlotByIndex need to say they MayHaveIndexedAccessors
+        https://bugs.webkit.org/show_bug.cgi?id=209762
+
+        Reviewed by Darin Adler.
+
+        There may be places where we rely on this for semantic
+        correctness. I couldn't find any right now but we might as
+        well be conservative since this isn't a performance regression.
+
+        * bindings/js/JSDOMWindowProperties.h:
+        * bindings/scripts/CodeGeneratorJS.pm:
+        (GenerateHeader):
+        * bindings/scripts/test/JS/JSInterfaceName.h:
+        (WebCore::JSInterfaceName::createStructure):
+        * bindings/scripts/test/JS/JSMapLike.h:
+        (WebCore::JSMapLike::createStructure):
+        * bindings/scripts/test/JS/JSReadOnlyMapLike.h:
+        (WebCore::JSReadOnlyMapLike::createStructure):
+        * bindings/scripts/test/JS/JSReadOnlySetLike.h:
+        (WebCore::JSReadOnlySetLike::createStructure):
+        * bindings/scripts/test/JS/JSSetLike.h:
+        (WebCore::JSSetLike::createStructure):
+        * bindings/scripts/test/JS/JSTestActiveDOMObject.h:
+        (WebCore::JSTestActiveDOMObject::createStructure):
+        * bindings/scripts/test/JS/JSTestCEReactions.h:
+        (WebCore::JSTestCEReactions::createStructure):
+        * bindings/scripts/test/JS/JSTestCEReactionsStringifier.h:
+        (WebCore::JSTestCEReactionsStringifier::createStructure):
+        * bindings/scripts/test/JS/JSTestCallTracer.h:
+        (WebCore::JSTestCallTracer::createStructure):
+        * bindings/scripts/test/JS/JSTestClassWithJSBuiltinConstructor.h:
+        (WebCore::JSTestClassWithJSBuiltinConstructor::createStructure):
+        * bindings/scripts/test/JS/JSTestDOMJIT.h:
+        (WebCore::JSTestDOMJIT::createStructure):
+        * bindings/scripts/test/JS/JSTestEnabledBySetting.h:
+        (WebCore::JSTestEnabledBySetting::createStructure):
+        * bindings/scripts/test/JS/JSTestEnabledForContext.h:
+        (WebCore::JSTestEnabledForContext::createStructure):
+        * bindings/scripts/test/JS/JSTestEventConstructor.h:
+        (WebCore::JSTestEventConstructor::createStructure):
+        * bindings/scripts/test/JS/JSTestEventTarget.h:
+        (WebCore::JSTestEventTarget::createStructure):
+        * bindings/scripts/test/JS/JSTestException.h:
+        (WebCore::JSTestException::createStructure):
+        * bindings/scripts/test/JS/JSTestGenerateIsReachable.h:
+        (WebCore::JSTestGenerateIsReachable::createStructure):
+        * bindings/scripts/test/JS/JSTestGlobalObject.h:
+        (WebCore::JSTestGlobalObject::createStructure):
+        * bindings/scripts/test/JS/JSTestIndexedSetterNoIdentifier.h:
+        (WebCore::JSTestIndexedSetterNoIdentifier::createStructure):
+        * bindings/scripts/test/JS/JSTestIndexedSetterThrowingException.h:
+        (WebCore::JSTestIndexedSetterThrowingException::createStructure):
+        * bindings/scripts/test/JS/JSTestIndexedSetterWithIdentifier.h:
+        (WebCore::JSTestIndexedSetterWithIdentifier::createStructure):
+        * bindings/scripts/test/JS/JSTestInterface.h:
+        * bindings/scripts/test/JS/JSTestInterfaceLeadingUnderscore.h:
+        (WebCore::JSTestInterfaceLeadingUnderscore::createStructure):
+        * bindings/scripts/test/JS/JSTestIterable.h:
+        (WebCore::JSTestIterable::createStructure):
+        * bindings/scripts/test/JS/JSTestJSBuiltinConstructor.h:
+        (WebCore::JSTestJSBuiltinConstructor::createStructure):
+        * bindings/scripts/test/JS/JSTestMediaQueryListListener.h:
+        (WebCore::JSTestMediaQueryListListener::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedAndIndexedSetterNoIdentifier.h:
+        (WebCore::JSTestNamedAndIndexedSetterNoIdentifier::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedAndIndexedSetterThrowingException.h:
+        (WebCore::JSTestNamedAndIndexedSetterThrowingException::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedAndIndexedSetterWithIdentifier.h:
+        (WebCore::JSTestNamedAndIndexedSetterWithIdentifier::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedConstructor.h:
+        (WebCore::JSTestNamedConstructor::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedDeleterNoIdentifier.h:
+        (WebCore::JSTestNamedDeleterNoIdentifier::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedDeleterThrowingException.h:
+        (WebCore::JSTestNamedDeleterThrowingException::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedDeleterWithIdentifier.h:
+        (WebCore::JSTestNamedDeleterWithIdentifier::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedDeleterWithIndexedGetter.h:
+        (WebCore::JSTestNamedDeleterWithIndexedGetter::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedGetterCallWith.h:
+        (WebCore::JSTestNamedGetterCallWith::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedGetterNoIdentifier.h:
+        (WebCore::JSTestNamedGetterNoIdentifier::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedGetterWithIdentifier.h:
+        (WebCore::JSTestNamedGetterWithIdentifier::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedSetterNoIdentifier.h:
+        (WebCore::JSTestNamedSetterNoIdentifier::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedSetterThrowingException.h:
+        (WebCore::JSTestNamedSetterThrowingException::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedSetterWithIdentifier.h:
+        (WebCore::JSTestNamedSetterWithIdentifier::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetter.h:
+        (WebCore::JSTestNamedSetterWithIndexedGetter::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetterAndSetter.h:
+        (WebCore::JSTestNamedSetterWithIndexedGetterAndSetter::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedSetterWithOverrideBuiltins.h:
+        (WebCore::JSTestNamedSetterWithOverrideBuiltins::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedSetterWithUnforgableProperties.h:
+        (WebCore::JSTestNamedSetterWithUnforgableProperties::createStructure):
+        * bindings/scripts/test/JS/JSTestNamedSetterWithUnforgablePropertiesAndOverrideBuiltins.h:
+        (WebCore::JSTestNamedSetterWithUnforgablePropertiesAndOverrideBuiltins::createStructure):
+        * bindings/scripts/test/JS/JSTestNode.h:
+        * bindings/scripts/test/JS/JSTestObj.h:
+        (WebCore::JSTestObj::createStructure):
+        * bindings/scripts/test/JS/JSTestOverloadedConstructors.h:
+        (WebCore::JSTestOverloadedConstructors::createStructure):
+        * bindings/scripts/test/JS/JSTestOverloadedConstructorsWithSequence.h:
+        (WebCore::JSTestOverloadedConstructorsWithSequence::createStructure):
+        * bindings/scripts/test/JS/JSTestOverrideBuiltins.h:
+        (WebCore::JSTestOverrideBuiltins::createStructure):
+        * bindings/scripts/test/JS/JSTestPluginInterface.h:
+        (WebCore::JSTestPluginInterface::createStructure):
+        * bindings/scripts/test/JS/JSTestPromiseRejectionEvent.h:
+        (WebCore::JSTestPromiseRejectionEvent::createStructure):
+        * bindings/scripts/test/JS/JSTestSerialization.h:
+        (WebCore::JSTestSerialization::createStructure):
+        * bindings/scripts/test/JS/JSTestSerializationIndirectInheritance.h:
+        (WebCore::JSTestSerializationIndirectInheritance::createStructure):
+        * bindings/scripts/test/JS/JSTestSerializationInherit.h:
+        (WebCore::JSTestSerializationInherit::createStructure):
+        * bindings/scripts/test/JS/JSTestSerializationInheritFinal.h:
+        (WebCore::JSTestSerializationInheritFinal::createStructure):
+        * bindings/scripts/test/JS/JSTestSerializedScriptValueInterface.h:
+        (WebCore::JSTestSerializedScriptValueInterface::createStructure):
+        * bindings/scripts/test/JS/JSTestStringifier.h:
+        (WebCore::JSTestStringifier::createStructure):
+        * bindings/scripts/test/JS/JSTestStringifierAnonymousOperation.h:
+        (WebCore::JSTestStringifierAnonymousOperation::createStructure):
+        * bindings/scripts/test/JS/JSTestStringifierNamedOperation.h:
+        (WebCore::JSTestStringifierNamedOperation::createStructure):
+        * bindings/scripts/test/JS/JSTestStringifierOperationImplementedAs.h:
+        (WebCore::JSTestStringifierOperationImplementedAs::createStructure):
+        * bindings/scripts/test/JS/JSTestStringifierOperationNamedToString.h:
+        (WebCore::JSTestStringifierOperationNamedToString::createStructure):
+        * bindings/scripts/test/JS/JSTestStringifierReadOnlyAttribute.h:
+        (WebCore::JSTestStringifierReadOnlyAttribute::createStructure):
+        * bindings/scripts/test/JS/JSTestStringifierReadWriteAttribute.h:
+        (WebCore::JSTestStringifierReadWriteAttribute::createStructure):
+        * bindings/scripts/test/JS/JSTestTypedefs.h:
+        (WebCore::JSTestTypedefs::createStructure):
+
 2020-04-01  Jer Noble  <jer.noble@apple.com>
 
         Don't use raw pointers in ShadowRoot.
diff --git a/Source/WebCore/bindings/js/JSDOMWindowProperties.h b/Source/WebCore/bindings/js/JSDOMWindowProperties.h
index ff186eb..318c6607 100644
--- a/Source/WebCore/bindings/js/JSDOMWindowProperties.h
+++ b/Source/WebCore/bindings/js/JSDOMWindowProperties.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static bool getOwnPropertySlot(JSC::JSObject*, JSC::JSGlobalObject*, JSC::PropertyName, JSC::PropertySlot&);
diff --git a/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm b/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm
index 89203fd..440d6f1 100644
--- a/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm
+++ b/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm
@@ -2744,15 +2744,16 @@
     # Structure ID
     push(@headerContent, "    static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)\n");
     push(@headerContent, "    {\n");
+    my $indexingModeIncludingHistory = InstanceOverridesGetOwnPropertySlot($interface) ? "JSC::MayHaveIndexedAccessors" : "JSC::NonArray";
     if (IsDOMGlobalObject($interface)) {
-        push(@headerContent, "        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::GlobalObjectType, StructureFlags), info());\n");
+        push(@headerContent, "        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::GlobalObjectType, StructureFlags), info(), $indexingModeIncludingHistory);\n");
     } elsif ($codeGenerator->InheritsInterface($interface, "Node")) {
         my $type = GetJSTypeForNode($interface);
-        push(@headerContent, "        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::JSType($type), StructureFlags), info());\n");
+        push(@headerContent, "        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::JSType($type), StructureFlags), info(), $indexingModeIncludingHistory);\n");
     } elsif ($codeGenerator->InheritsInterface($interface, "Event")) {
-        push(@headerContent, "        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::JSType(JSEventType), StructureFlags), info());\n");
+        push(@headerContent, "        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::JSType(JSEventType), StructureFlags), info(), $indexingModeIncludingHistory);\n");
     } else {
-        push(@headerContent, "        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());\n");
+        push(@headerContent, "        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), $indexingModeIncludingHistory);\n");
     }
     push(@headerContent, "    }\n\n");
 
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSInterfaceName.h b/Source/WebCore/bindings/scripts/test/JS/JSInterfaceName.h
index 1f3d17f..f1fa9b0 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSInterfaceName.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSInterfaceName.h
@@ -46,7 +46,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSMapLike.h b/Source/WebCore/bindings/scripts/test/JS/JSMapLike.h
index 49a00a3..7631ffc 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSMapLike.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSMapLike.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSReadOnlyMapLike.h b/Source/WebCore/bindings/scripts/test/JS/JSReadOnlyMapLike.h
index 22d30be..81dcde0 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSReadOnlyMapLike.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSReadOnlyMapLike.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSReadOnlySetLike.h b/Source/WebCore/bindings/scripts/test/JS/JSReadOnlySetLike.h
index 7f50779..c6d70a8 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSReadOnlySetLike.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSReadOnlySetLike.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSSetLike.h b/Source/WebCore/bindings/scripts/test/JS/JSSetLike.h
index a1a1553..c5eafb6 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSSetLike.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSSetLike.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestActiveDOMObject.h b/Source/WebCore/bindings/scripts/test/JS/JSTestActiveDOMObject.h
index 2fc9f06..9e75241 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestActiveDOMObject.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestActiveDOMObject.h
@@ -46,7 +46,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestCEReactions.h b/Source/WebCore/bindings/scripts/test/JS/JSTestCEReactions.h
index 4f67a70..f7a3119 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestCEReactions.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestCEReactions.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestCEReactionsStringifier.h b/Source/WebCore/bindings/scripts/test/JS/JSTestCEReactionsStringifier.h
index 83c22ca..bcd18d1 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestCEReactionsStringifier.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestCEReactionsStringifier.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestCallTracer.h b/Source/WebCore/bindings/scripts/test/JS/JSTestCallTracer.h
index a772bf3..f60c838 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestCallTracer.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestCallTracer.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestClassWithJSBuiltinConstructor.h b/Source/WebCore/bindings/scripts/test/JS/JSTestClassWithJSBuiltinConstructor.h
index cc66049..ab60010 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestClassWithJSBuiltinConstructor.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestClassWithJSBuiltinConstructor.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestDOMJIT.h b/Source/WebCore/bindings/scripts/test/JS/JSTestDOMJIT.h
index cbf33c2..01d56bd 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestDOMJIT.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestDOMJIT.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::JSType(JSNodeType), StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::JSType(JSNodeType), StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestEnabledBySetting.h b/Source/WebCore/bindings/scripts/test/JS/JSTestEnabledBySetting.h
index c476219..91d4c0b 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestEnabledBySetting.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestEnabledBySetting.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestEnabledForContext.h b/Source/WebCore/bindings/scripts/test/JS/JSTestEnabledForContext.h
index 5f8e946..7291eeb 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestEnabledForContext.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestEnabledForContext.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestEventConstructor.h b/Source/WebCore/bindings/scripts/test/JS/JSTestEventConstructor.h
index 9b13e6c..f4d1661 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestEventConstructor.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestEventConstructor.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::JSType(JSEventType), StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::JSType(JSEventType), StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestEventTarget.h b/Source/WebCore/bindings/scripts/test/JS/JSTestEventTarget.h
index 1fafb46..699aaa3 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestEventTarget.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestEventTarget.h
@@ -49,7 +49,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestException.h b/Source/WebCore/bindings/scripts/test/JS/JSTestException.h
index 63162d9..94250bc 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestException.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestException.h
@@ -46,7 +46,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestGenerateIsReachable.h b/Source/WebCore/bindings/scripts/test/JS/JSTestGenerateIsReachable.h
index 3aee4f3..ae54f15 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestGenerateIsReachable.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestGenerateIsReachable.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestGlobalObject.h b/Source/WebCore/bindings/scripts/test/JS/JSTestGlobalObject.h
index e7ecd29..97522aa 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestGlobalObject.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestGlobalObject.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::GlobalObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::GlobalObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestIndexedSetterNoIdentifier.h b/Source/WebCore/bindings/scripts/test/JS/JSTestIndexedSetterNoIdentifier.h
index 7953b0e..ebc9d13 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestIndexedSetterNoIdentifier.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestIndexedSetterNoIdentifier.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestIndexedSetterThrowingException.h b/Source/WebCore/bindings/scripts/test/JS/JSTestIndexedSetterThrowingException.h
index 1cd5568..ca445ce 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestIndexedSetterThrowingException.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestIndexedSetterThrowingException.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestIndexedSetterWithIdentifier.h b/Source/WebCore/bindings/scripts/test/JS/JSTestIndexedSetterWithIdentifier.h
index fff1526..dd499a9 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestIndexedSetterWithIdentifier.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestIndexedSetterWithIdentifier.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestInterface.h b/Source/WebCore/bindings/scripts/test/JS/JSTestInterface.h
index a6ea83c6..d11181d 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestInterface.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestInterface.h
@@ -49,7 +49,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestInterfaceLeadingUnderscore.h b/Source/WebCore/bindings/scripts/test/JS/JSTestInterfaceLeadingUnderscore.h
index b19f385..ee93aa6 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestInterfaceLeadingUnderscore.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestInterfaceLeadingUnderscore.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestIterable.h b/Source/WebCore/bindings/scripts/test/JS/JSTestIterable.h
index 0f37806..1c6d396 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestIterable.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestIterable.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestJSBuiltinConstructor.h b/Source/WebCore/bindings/scripts/test/JS/JSTestJSBuiltinConstructor.h
index a429bcd..25988a5 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestJSBuiltinConstructor.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestJSBuiltinConstructor.h
@@ -42,7 +42,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestMediaQueryListListener.h b/Source/WebCore/bindings/scripts/test/JS/JSTestMediaQueryListListener.h
index f390d05..630d6b1 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestMediaQueryListListener.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestMediaQueryListListener.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterNoIdentifier.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterNoIdentifier.h
index e4a2286..5c40523 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterNoIdentifier.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterNoIdentifier.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterThrowingException.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterThrowingException.h
index 060536b..eb3c4f5 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterThrowingException.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterThrowingException.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterWithIdentifier.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterWithIdentifier.h
index 3662a3f..432c56e 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterWithIdentifier.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterWithIdentifier.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedConstructor.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedConstructor.h
index 0740383..a47f64d 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedConstructor.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedConstructor.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterNoIdentifier.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterNoIdentifier.h
index 3342b7b..83638a3 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterNoIdentifier.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterNoIdentifier.h
@@ -50,7 +50,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterThrowingException.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterThrowingException.h
index 5fa42d5..910f52c 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterThrowingException.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterThrowingException.h
@@ -50,7 +50,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIdentifier.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIdentifier.h
index e45c749..a3ab65e 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIdentifier.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIdentifier.h
@@ -50,7 +50,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIndexedGetter.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIndexedGetter.h
index 540565e..34bc624 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIndexedGetter.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIndexedGetter.h
@@ -50,7 +50,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterCallWith.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterCallWith.h
index eea68bd..ff4d36e 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterCallWith.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterCallWith.h
@@ -48,7 +48,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterNoIdentifier.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterNoIdentifier.h
index 2c1810f9..4d50f8a 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterNoIdentifier.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterNoIdentifier.h
@@ -48,7 +48,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterWithIdentifier.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterWithIdentifier.h
index d19d68f..5fc401f 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterWithIdentifier.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterWithIdentifier.h
@@ -48,7 +48,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterNoIdentifier.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterNoIdentifier.h
index b72b6d3..0f213459 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterNoIdentifier.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterNoIdentifier.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterThrowingException.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterThrowingException.h
index a9f7c2f..d1af051 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterThrowingException.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterThrowingException.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIdentifier.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIdentifier.h
index 67c5f82..dc30aa6 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIdentifier.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIdentifier.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetter.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetter.h
index dbc4073..267f6ec 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetter.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetter.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetterAndSetter.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetterAndSetter.h
index a56f72b..e5d3bb4 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetterAndSetter.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetterAndSetter.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithOverrideBuiltins.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithOverrideBuiltins.h
index 05fa495..f23083a 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithOverrideBuiltins.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithOverrideBuiltins.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgableProperties.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgableProperties.h
index 4d1ee0e..8b43fda 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgableProperties.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgableProperties.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgablePropertiesAndOverrideBuiltins.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgablePropertiesAndOverrideBuiltins.h
index cdfd4a4..0bca84ae 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgablePropertiesAndOverrideBuiltins.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgablePropertiesAndOverrideBuiltins.h
@@ -51,7 +51,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNode.h b/Source/WebCore/bindings/scripts/test/JS/JSTestNode.h
index 4bb69eb..3c96ff9 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNode.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNode.h
@@ -44,7 +44,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::JSType(JSNodeType), StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::JSType(JSNodeType), StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestObj.h b/Source/WebCore/bindings/scripts/test/JS/JSTestObj.h
index 6d58ec6..a64d4fb 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestObj.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestObj.h
@@ -53,7 +53,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestOverloadedConstructors.h b/Source/WebCore/bindings/scripts/test/JS/JSTestOverloadedConstructors.h
index 8670585..98e1658 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestOverloadedConstructors.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestOverloadedConstructors.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestOverloadedConstructorsWithSequence.h b/Source/WebCore/bindings/scripts/test/JS/JSTestOverloadedConstructorsWithSequence.h
index 2030436..74f367d 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestOverloadedConstructorsWithSequence.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestOverloadedConstructorsWithSequence.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestOverrideBuiltins.h b/Source/WebCore/bindings/scripts/test/JS/JSTestOverrideBuiltins.h
index 5bc03a8..601d628 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestOverrideBuiltins.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestOverrideBuiltins.h
@@ -48,7 +48,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestPluginInterface.h b/Source/WebCore/bindings/scripts/test/JS/JSTestPluginInterface.h
index 532e3bc..f947ba8 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestPluginInterface.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestPluginInterface.h
@@ -52,7 +52,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::MayHaveIndexedAccessors);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestPromiseRejectionEvent.h b/Source/WebCore/bindings/scripts/test/JS/JSTestPromiseRejectionEvent.h
index 65c728c..769740e 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestPromiseRejectionEvent.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestPromiseRejectionEvent.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::JSType(JSEventType), StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::JSType(JSEventType), StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestSerialization.h b/Source/WebCore/bindings/scripts/test/JS/JSTestSerialization.h
index 2936824..fe9418a 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestSerialization.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestSerialization.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestSerializationIndirectInheritance.h b/Source/WebCore/bindings/scripts/test/JS/JSTestSerializationIndirectInheritance.h
index e0bc2b9..8817331 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestSerializationIndirectInheritance.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestSerializationIndirectInheritance.h
@@ -44,7 +44,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestSerializationInherit.h b/Source/WebCore/bindings/scripts/test/JS/JSTestSerializationInherit.h
index 956a54d..1531f79 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestSerializationInherit.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestSerializationInherit.h
@@ -44,7 +44,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestSerializationInheritFinal.h b/Source/WebCore/bindings/scripts/test/JS/JSTestSerializationInheritFinal.h
index 727a353..31b2cb0 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestSerializationInheritFinal.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestSerializationInheritFinal.h
@@ -44,7 +44,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestSerializedScriptValueInterface.h b/Source/WebCore/bindings/scripts/test/JS/JSTestSerializedScriptValueInterface.h
index a2a6738..7f84fef 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestSerializedScriptValueInterface.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestSerializedScriptValueInterface.h
@@ -47,7 +47,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifier.h b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifier.h
index 6187404..5718a74 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifier.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifier.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierAnonymousOperation.h b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierAnonymousOperation.h
index 2ccc0de..e012574 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierAnonymousOperation.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierAnonymousOperation.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierNamedOperation.h b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierNamedOperation.h
index b94623f..a6d70bf 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierNamedOperation.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierNamedOperation.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierOperationImplementedAs.h b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierOperationImplementedAs.h
index ce3cb08..f321667 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierOperationImplementedAs.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierOperationImplementedAs.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierOperationNamedToString.h b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierOperationNamedToString.h
index 165ee6e..f23d712 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierOperationNamedToString.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierOperationNamedToString.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierReadOnlyAttribute.h b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierReadOnlyAttribute.h
index d5ac53f..759a9c2 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierReadOnlyAttribute.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierReadOnlyAttribute.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierReadWriteAttribute.h b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierReadWriteAttribute.h
index de68c29..7037d42 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierReadWriteAttribute.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestStringifierReadWriteAttribute.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);
diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestTypedefs.h b/Source/WebCore/bindings/scripts/test/JS/JSTestTypedefs.h
index 64e7ee8..f438473 100644
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestTypedefs.h
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestTypedefs.h
@@ -45,7 +45,7 @@
 
     static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
     {
-        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info(), JSC::NonArray);
     }
 
     static JSC::JSValue getConstructor(JSC::VM&, const JSC::JSGlobalObject*);