diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
index deefad2..a713d01 100644
--- a/Source/WebCore/ChangeLog
+++ b/Source/WebCore/ChangeLog
@@ -1,3 +1,16 @@
+2020-01-16  Fujii Hironori  <Hironori.Fujii@sony.com>
+
+        Unreviewed, rolling out r254678.
+
+        API tests failures for Mac port
+
+        Reverted changeset:
+
+        "KeyedDecoderGeneric crashes when it accesses data with non-
+        existing key"
+        https://bugs.webkit.org/show_bug.cgi?id=205902
+        https://trac.webkit.org/changeset/254678
+
 2020-01-16  Jiewen Tan  <jiewen_tan@apple.com>
 
         [WebAuthn] User Verification (UV) option present on a CTAP2 authenticatorMakeCredential while the authenticator has not advertised support for it
diff --git a/Source/WebCore/platform/generic/KeyedDecoderGeneric.cpp b/Source/WebCore/platform/generic/KeyedDecoderGeneric.cpp
index bc57cb7..0e59723 100644
--- a/Source/WebCore/platform/generic/KeyedDecoderGeneric.cpp
+++ b/Source/WebCore/platform/generic/KeyedDecoderGeneric.cpp
@@ -42,7 +42,7 @@
 
     template <typename T>
     void add(const String& key, T&& value) { m_map.add(key, makeUnique<Node>(std::forward<T>(value))); }
-    Node* get(const String& key) { return m_map.get(key); }
+    Node& get(const String& key) { return *m_map.get(key); }
 
 private:
     HashMap<String, std::unique_ptr<Node>> m_map;
@@ -181,35 +181,11 @@
         m_arrayStack.removeLast();
 }
 
-template<typename T>
-const T* KeyedDecoderGeneric::getPointerFromDictionaryStack(const String& key)
-{
-    auto& dictionary = m_dictionaryStack.last();
-
-    auto node = dictionary->get(key);
-    if (!node)
-        return nullptr;
-
-    return WTF::get_if<T>(*node);
-}
-
-template<typename T>
-bool KeyedDecoderGeneric::decodeSimpleValue(const String& key, T& result)
-{
-    auto value = getPointerFromDictionaryStack<T>(key);
-    if (!value)
-        return false;
-
-    result = *value;
-    return true;
-}
-
 bool KeyedDecoderGeneric::decodeBytes(const String& key, const uint8_t*& data, size_t& size)
 {
-    auto value = getPointerFromDictionaryStack<Vector<uint8_t>>(key);
+    auto* value = WTF::get_if<Vector<uint8_t>>(m_dictionaryStack.last()->get(key));
     if (!value)
         return false;
-
     data = value->data();
     size = value->size();
     return true;
@@ -217,50 +193,81 @@
 
 bool KeyedDecoderGeneric::decodeBool(const String& key, bool& result)
 {
-    return decodeSimpleValue(key, result);
+    auto* value = WTF::get_if<bool>(m_dictionaryStack.last()->get(key));
+    if (!value)
+        return false;
+    result = *value;
+    return true;
 }
 
 bool KeyedDecoderGeneric::decodeUInt32(const String& key, uint32_t& result)
 {
-    return decodeSimpleValue(key, result);
+    auto* value = WTF::get_if<uint32_t>(m_dictionaryStack.last()->get(key));
+    if (!value)
+        return false;
+    result = *value;
+    return true;
 }
 
 bool KeyedDecoderGeneric::decodeUInt64(const String& key, uint64_t& result)
 {
-    return decodeSimpleValue(key, result);
+    auto* value = WTF::get_if<uint64_t>(m_dictionaryStack.last()->get(key));
+    if (!value)
+        return false;
+    result = *value;
+    return true;
 }
 
 bool KeyedDecoderGeneric::decodeInt32(const String& key, int32_t& result)
 {
-    return decodeSimpleValue(key, result);
+    auto* value = WTF::get_if<int32_t>(m_dictionaryStack.last()->get(key));
+    if (!value)
+        return false;
+    result = *value;
+    return true;
 }
 
 bool KeyedDecoderGeneric::decodeInt64(const String& key, int64_t& result)
 {
-    return decodeSimpleValue(key, result);
+    auto* value = WTF::get_if<int64_t>(m_dictionaryStack.last()->get(key));
+    if (!value)
+        return false;
+    result = *value;
+    return true;
 }
 
 bool KeyedDecoderGeneric::decodeFloat(const String& key, float& result)
 {
-    return decodeSimpleValue(key, result);
+    auto* value = WTF::get_if<float>(m_dictionaryStack.last()->get(key));
+    if (!value)
+        return false;
+    result = *value;
+    return true;
 }
 
 bool KeyedDecoderGeneric::decodeDouble(const String& key, double& result)
 {
-    return decodeSimpleValue(key, result);
+    auto* value = WTF::get_if<double>(m_dictionaryStack.last()->get(key));
+    if (!value)
+        return false;
+    result = *value;
+    return true;
 }
 
 bool KeyedDecoderGeneric::decodeString(const String& key, String& result)
 {
-    return decodeSimpleValue(key, result);
+    auto* value = WTF::get_if<String>(m_dictionaryStack.last()->get(key));
+    if (!value)
+        return false;
+    result = *value;
+    return true;
 }
 
 bool KeyedDecoderGeneric::beginObject(const String& key)
 {
-    auto value = getPointerFromDictionaryStack<std::unique_ptr<Dictionary>>(key);
+    auto* value = WTF::get_if<std::unique_ptr<Dictionary>>(m_dictionaryStack.last()->get(key));
     if (!value)
         return false;
-
     m_dictionaryStack.append(value->get());
     return true;
 }
@@ -272,10 +279,9 @@
 
 bool KeyedDecoderGeneric::beginArray(const String& key)
 {
-    auto value = getPointerFromDictionaryStack<std::unique_ptr<Array>>(key);
+    auto* value = WTF::get_if<std::unique_ptr<Array>>(m_dictionaryStack.last()->get(key));
     if (!value)
         return false;
-
     m_arrayStack.append(value->get());
     m_arrayIndexStack.append(0);
     return true;
diff --git a/Source/WebCore/platform/generic/KeyedDecoderGeneric.h b/Source/WebCore/platform/generic/KeyedDecoderGeneric.h
index 19a299b..56a2f93 100644
--- a/Source/WebCore/platform/generic/KeyedDecoderGeneric.h
+++ b/Source/WebCore/platform/generic/KeyedDecoderGeneric.h
@@ -55,12 +55,6 @@
     void endArrayElement() override;
     void endArray() override;
 
-    template<typename T>
-    const T* getPointerFromDictionaryStack(const String& key);
-
-    template<typename T>
-    bool decodeSimpleValue(const String& key, T& result);
-
     std::unique_ptr<Dictionary> m_rootDictionary;
     Vector<Dictionary*, 16> m_dictionaryStack;
     Vector<Array*, 16> m_arrayStack;
diff --git a/Tools/ChangeLog b/Tools/ChangeLog
index 8b9c93b..52183f1 100644
--- a/Tools/ChangeLog
+++ b/Tools/ChangeLog
@@ -1,3 +1,16 @@
+2020-01-16  Fujii Hironori  <Hironori.Fujii@sony.com>
+
+        Unreviewed, rolling out r254678.
+
+        API tests failures for Mac port
+
+        Reverted changeset:
+
+        "KeyedDecoderGeneric crashes when it accesses data with non-
+        existing key"
+        https://bugs.webkit.org/show_bug.cgi?id=205902
+        https://trac.webkit.org/changeset/254678
+
 2020-01-16  Chris Dumez  <cdumez@apple.com>
 
         Regression(r253224) No longer able to prevent a tab from closing via the beforeunload prompt
diff --git a/Tools/TestWebKitAPI/CMakeLists.txt b/Tools/TestWebKitAPI/CMakeLists.txt
index 97da060..a57c73d 100644
--- a/Tools/TestWebKitAPI/CMakeLists.txt
+++ b/Tools/TestWebKitAPI/CMakeLists.txt
@@ -138,7 +138,6 @@
         Tests/WebCore/IntPoint.cpp
         Tests/WebCore/IntRect.cpp
         Tests/WebCore/IntSize.cpp
-        Tests/WebCore/KeyedCoding.cpp
         Tests/WebCore/LayoutUnit.cpp
         Tests/WebCore/MIMETypeRegistry.cpp
         Tests/WebCore/ParsedContentRange.cpp
diff --git a/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj b/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj
index 12d4759..67f9f98 100644
--- a/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj
+++ b/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj
@@ -120,7 +120,6 @@
 		26F52EB218288F240023D412 /* geolocationWatchPosition.html in Copy Resources */ = {isa = PBXBuildFile; fileRef = 26F52EB018288F0F0023D412 /* geolocationWatchPosition.html */; };
 		26F52EB318288F240023D412 /* geolocationWatchPositionWithHighAccuracy.html in Copy Resources */ = {isa = PBXBuildFile; fileRef = 26F52EB118288F0F0023D412 /* geolocationWatchPositionWithHighAccuracy.html */; };
 		272A691022F012DA000FDABB /* PageLoadState.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 272A690F22F012C7000FDABB /* PageLoadState.cpp */; };
-		278E3E1923CD842F005A6B80 /* KeyedCoding.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 278E3E1823CD82FA005A6B80 /* KeyedCoding.cpp */; };
 		290A9BB91735F63800D71BBC /* OpenNewWindow.html in Copy Resources */ = {isa = PBXBuildFile; fileRef = 290A9BB81735F42300D71BBC /* OpenNewWindow.html */; };
 		290F4275172A221C00939FF0 /* custom-protocol-sync-xhr.html in Copy Resources */ = {isa = PBXBuildFile; fileRef = 290F4274172A1FDE00939FF0 /* custom-protocol-sync-xhr.html */; };
 		297234B7173AFAC700983601 /* CustomProtocolsInvalidScheme_Bundle.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 297234B5173AFAC700983601 /* CustomProtocolsInvalidScheme_Bundle.cpp */; };
@@ -1632,7 +1631,6 @@
 		26F6E1EF1ADC749B00DE696B /* DFAMinimizer.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = DFAMinimizer.cpp; sourceTree = "<group>"; };
 		272A690F22F012C7000FDABB /* PageLoadState.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = PageLoadState.cpp; sourceTree = "<group>"; };
 		278DE64B22B8D611004E0E7A /* CrossThreadCopier.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CrossThreadCopier.cpp; sourceTree = "<group>"; };
-		278E3E1823CD82FA005A6B80 /* KeyedCoding.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = KeyedCoding.cpp; sourceTree = "<group>"; };
 		290A9BB51735DE8A00D71BBC /* CloseNewWindowInNavigationPolicyDelegate.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = CloseNewWindowInNavigationPolicyDelegate.mm; sourceTree = "<group>"; };
 		290A9BB81735F42300D71BBC /* OpenNewWindow.html */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.html; path = OpenNewWindow.html; sourceTree = "<group>"; };
 		290F4274172A1FDE00939FF0 /* custom-protocol-sync-xhr.html */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.html; path = "custom-protocol-sync-xhr.html"; sourceTree = "<group>"; };
@@ -3155,7 +3153,6 @@
 				7A909A741D877475007E10F8 /* IntRect.cpp */,
 				7A909A751D877475007E10F8 /* IntSize.cpp */,
 				CD5FF4962162E27E004BD86F /* ISOBox.cpp */,
-				278E3E1823CD82FA005A6B80 /* KeyedCoding.cpp */,
 				14464012167A8305000BD218 /* LayoutUnit.cpp */,
 				6BF4A682239ED4CD00E2F45B /* LoggedInStatus.cpp */,
 				076E507E1F45031E006E9F5A /* Logging.cpp */,
@@ -4770,7 +4767,6 @@
 				E35FC7B222B82A7300F32F98 /* JSLockTakesWebThreadLock.mm in Sources */,
 				7CCE7EC41A411A7E00447C4C /* JSWrapperForNodeInWebFrame.mm in Sources */,
 				F45E15732112CE2900307E82 /* KeyboardInputTestsIOS.mm in Sources */,
-				278E3E1923CD842F005A6B80 /* KeyedCoding.cpp in Sources */,
 				7CCE7F061A411AE600447C4C /* LayoutMilestonesWithAllContentInFrame.cpp in Sources */,
 				7CCE7EDF1A411A9200447C4C /* LayoutUnit.cpp in Sources */,
 				F4BFA68E1E4AD08000154298 /* LegacyDragAndDropTests.mm in Sources */,
diff --git a/Tools/TestWebKitAPI/Tests/WebCore/KeyedCoding.cpp b/Tools/TestWebKitAPI/Tests/WebCore/KeyedCoding.cpp
deleted file mode 100644
index 8c72b58..0000000
--- a/Tools/TestWebKitAPI/Tests/WebCore/KeyedCoding.cpp
+++ /dev/null
@@ -1,321 +0,0 @@
-/*
- * Copyright (C) 2020 Sony Interactive Entertainment Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
- * THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-
-#include <WebCore/KeyedCoding.h>
-#include <WebCore/SharedBuffer.h>
-#include <cstdint>
-#include <wtf/text/WTFString.h>
-
-namespace TestWebKitAPI {
-
-static bool checkDecodedBytes(const uint8_t* original, size_t originalSize, const uint8_t* decoded, size_t decodedSize)
-{
-    if (originalSize != decodedSize)
-        return false;
-
-    return !std::memcmp(original, decoded, originalSize);
-}
-
-TEST(KeyedCoding, SetAndGetBytes)
-{
-    const uint8_t data[] = { 0x00, 0x01, 0x02, 0x03, 0xde, 0xad, 0xbe, 0xef };
-    const size_t dataLength = WTF_ARRAY_LENGTH(data);
-    const size_t dataLengthOne = 1;
-    const size_t dataLengthZero = 0;
-
-    auto encoder = WebCore::KeyedEncoder::encoder();
-    encoder->encodeBytes("data", data, dataLength);
-    encoder->encodeBytes("data-size0", data, dataLengthZero);
-    encoder->encodeBytes("data-size1", data, dataLengthOne);
-    auto encodedBuffer = encoder->finishEncoding();
-
-    auto decoder = WebCore::KeyedDecoder::decoder(reinterpret_cast<const uint8_t*>(encodedBuffer->data()), encodedBuffer->size());
-
-    bool success;
-    const uint8_t* buffer;
-    size_t size;
-
-    success = decoder->decodeBytes("data", buffer, size);
-    EXPECT_TRUE(success);
-    EXPECT_EQ(dataLength, size);
-    EXPECT_TRUE(checkDecodedBytes(data, dataLength, buffer, size));
-
-    success = decoder->decodeBytes("data-size0", buffer, size);
-    EXPECT_TRUE(success);
-    EXPECT_EQ(dataLengthZero, size);
-
-    success = decoder->decodeBytes("data-size1", buffer, size);
-    EXPECT_TRUE(success);
-    EXPECT_EQ(dataLengthOne, size);
-    EXPECT_TRUE(checkDecodedBytes(data, dataLengthOne, buffer, size));
-}
-
-template <typename EncodeFunctionType, typename DecodeValueType, typename EncodeValueType>
-bool testSimpleValue(EncodeFunctionType encode, bool (WebCore::KeyedDecoder::* decode)(const String&, DecodeValueType&), EncodeValueType value)
-{
-    auto encoder = WebCore::KeyedEncoder::encoder();
-    (encoder.get()->*encode)("key", value);
-
-    auto encodedBuffer = encoder->finishEncoding();
-    auto decoder = WebCore::KeyedDecoder::decoder(reinterpret_cast<const uint8_t*>(encodedBuffer->data()), encodedBuffer->size());
-
-    DecodeValueType decodedValue;
-    bool success = (decoder.get()->*decode)("key", decodedValue);
-
-    if constexpr (std::is_same_v<EncodeValueType, String> && std::is_same_v<DecodeValueType, String>) {
-        if (value.isEmpty() && decodedValue.isEmpty())
-            success = true;
-        else
-            success = success && decodedValue == value;
-    } else if constexpr (std::is_same_v<EncodeValueType, DecodeValueType>)
-        success = success && decodedValue == value;
-
-    return success;
-}
-
-TEST(KeyedCoding, SetAndGetBool)
-{
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeBool, &WebCore::KeyedDecoder::decodeBool, true));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeBool, &WebCore::KeyedDecoder::decodeBool, false));
-
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeBool, &WebCore::KeyedDecoder::decodeInt32, true));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeBool, &WebCore::KeyedDecoder::decodeUInt32, true));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeBool, &WebCore::KeyedDecoder::decodeInt64, true));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeBool, &WebCore::KeyedDecoder::decodeUInt64, true));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeBool, &WebCore::KeyedDecoder::decodeFloat, true));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeBool, &WebCore::KeyedDecoder::decodeDouble, true));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeBool, &WebCore::KeyedDecoder::decodeString, true));
-}
-
-TEST(KeyedCoding, SetAndGetInt32)
-{
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt32, &WebCore::KeyedDecoder::decodeInt32, 0));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt32, &WebCore::KeyedDecoder::decodeInt32, 1));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt32, &WebCore::KeyedDecoder::decodeInt32, -1));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt32, &WebCore::KeyedDecoder::decodeInt32, INT_MIN));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt32, &WebCore::KeyedDecoder::decodeInt32, INT_MAX));
-
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt32, &WebCore::KeyedDecoder::decodeBool, 0));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt32, &WebCore::KeyedDecoder::decodeString, 0));
-}
-
-TEST(KeyedCoding, SetAndGetUInt32)
-{
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeUInt32, &WebCore::KeyedDecoder::decodeUInt32, uint32_t(0)));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeUInt32, &WebCore::KeyedDecoder::decodeUInt32, uint32_t(1)));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeUInt32, &WebCore::KeyedDecoder::decodeUInt32, UINT32_MAX));
-
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeUInt32, &WebCore::KeyedDecoder::decodeBool, uint32_t(0)));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeUInt32, &WebCore::KeyedDecoder::decodeString, uint32_t(0)));
-}
-
-TEST(KeyedCoding, SetAndGetInt64)
-{
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt64, &WebCore::KeyedDecoder::decodeInt64, int64_t(0)));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt64, &WebCore::KeyedDecoder::decodeInt64, int64_t(-2)));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt64, &WebCore::KeyedDecoder::decodeInt64, int64_t(2)));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt64, &WebCore::KeyedDecoder::decodeInt64, INT64_MIN));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt64, &WebCore::KeyedDecoder::decodeInt64, INT64_MAX));
-
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt64, &WebCore::KeyedDecoder::decodeBool, int64_t(0)));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeInt64, &WebCore::KeyedDecoder::decodeString, int64_t(0)));
-}
-
-TEST(KeyedCoding, SetAndGetUInt64)
-{
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeUInt64, &WebCore::KeyedDecoder::decodeUInt64, uint64_t(0)));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeUInt64, &WebCore::KeyedDecoder::decodeUInt64, uint64_t(1)));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeUInt64, &WebCore::KeyedDecoder::decodeUInt64, UINT64_MAX));
-
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeUInt64, &WebCore::KeyedDecoder::decodeBool, uint64_t(0)));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeUInt64, &WebCore::KeyedDecoder::decodeString, uint64_t(0)));
-}
-
-TEST(KeyedCoding, SetAndGetFloat)
-{
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeFloat, &WebCore::KeyedDecoder::decodeFloat, float(0)));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeFloat, &WebCore::KeyedDecoder::decodeFloat, float(1.5)));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeFloat, &WebCore::KeyedDecoder::decodeFloat, float(-1.5)));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeFloat, &WebCore::KeyedDecoder::decodeFloat, std::numeric_limits<float>::lowest()));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeFloat, &WebCore::KeyedDecoder::decodeFloat, std::numeric_limits<float>::min()));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeFloat, &WebCore::KeyedDecoder::decodeFloat, std::numeric_limits<float>::max()));
-
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeFloat, &WebCore::KeyedDecoder::decodeBool, float(0)));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeFloat, &WebCore::KeyedDecoder::decodeString, float(0)));
-}
-
-TEST(KeyedCoding, SetAndGetDouble)
-{
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeDouble, &WebCore::KeyedDecoder::decodeDouble, double(0)));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeDouble, &WebCore::KeyedDecoder::decodeDouble, double(1.25)));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeDouble, &WebCore::KeyedDecoder::decodeDouble, double(-1.25)));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeDouble, &WebCore::KeyedDecoder::decodeDouble, std::numeric_limits<double>::lowest()));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeDouble, &WebCore::KeyedDecoder::decodeDouble, std::numeric_limits<double>::min()));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeDouble, &WebCore::KeyedDecoder::decodeDouble, std::numeric_limits<double>::max()));
-
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeDouble, &WebCore::KeyedDecoder::decodeBool, double(0)));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeDouble, &WebCore::KeyedDecoder::decodeString, double(0)));
-}
-
-TEST(KeyedCoding, SetAndGetString)
-{
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeString, &WebCore::KeyedDecoder::decodeString, String()));
-    EXPECT_TRUE(testSimpleValue(&WebCore::KeyedEncoder::encodeString, &WebCore::KeyedDecoder::decodeString, String("WebKit")));
-
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeString, &WebCore::KeyedDecoder::decodeBool, String()));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeString, &WebCore::KeyedDecoder::decodeInt32, String()));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeString, &WebCore::KeyedDecoder::decodeUInt32, String()));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeString, &WebCore::KeyedDecoder::decodeInt64, String()));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeString, &WebCore::KeyedDecoder::decodeUInt64, String()));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeString, &WebCore::KeyedDecoder::decodeFloat, String()));
-    EXPECT_FALSE(testSimpleValue(&WebCore::KeyedEncoder::encodeString, &WebCore::KeyedDecoder::decodeDouble, String()));
-}
-
-TEST(KeyedCoding, GetNonExistingRecord)
-{
-    auto encoder = WebCore::KeyedEncoder::encoder();
-    encoder->encodeBool("bool-true", true);
-
-    auto encodedBuffer = encoder->finishEncoding();
-    auto decoder = WebCore::KeyedDecoder::decoder(reinterpret_cast<const uint8_t*>(encodedBuffer->data()), encodedBuffer->size());
-
-    bool success, boolValue;
-    success = decoder->decodeBool("bool-true", boolValue);
-    EXPECT_TRUE(success);
-    EXPECT_EQ(true, boolValue);
-
-    success = decoder->decodeBool("no-exist-key", boolValue);
-    EXPECT_FALSE(success);
-
-    int32_t int32Value;
-    success = decoder->decodeInt32("no-exist-key", int32Value);
-    EXPECT_FALSE(success);
-
-    uint32_t uint32Value;
-    success = decoder->decodeUInt32("no-exist-key", uint32Value);
-    EXPECT_FALSE(success);
-
-    int64_t int64Value;
-    success = decoder->decodeInt64("no-exist-key", int64Value);
-    EXPECT_FALSE(success);
-
-    uint64_t uint64Value;
-    success = decoder->decodeUInt64("no-exist-key", uint64Value);
-    EXPECT_FALSE(success);
-
-    float floatValue;
-    success = decoder->decodeFloat("no-exist-key", floatValue);
-    EXPECT_FALSE(success);
-
-    double doubleValue;
-    success = decoder->decodeDouble("no-exist-key", doubleValue);
-    EXPECT_FALSE(success);
-
-    const uint8_t* buffer;
-    size_t size;
-    success = decoder->decodeBytes("no-exist-key", buffer, size);
-    EXPECT_FALSE(success);
-}
-
-struct KeyedCodingTestObject {
-    static void encode(WebCore::KeyedEncoder& encoder, const KeyedCodingTestObject& object)
-    {
-        encoder.encodeString("name", object.m_name);
-        encoder.encodeInt32("age", object.m_age);
-    }
-
-    static bool decode(WebCore::KeyedDecoder& decoder, KeyedCodingTestObject& object)
-    {
-        if (!decoder.decodeString("name", object.m_name))
-            return false;
-        if (!decoder.decodeInt32("age", object.m_age))
-            return false;
-        return true;
-    }
-
-    KeyedCodingTestObject() { };
-    KeyedCodingTestObject(String name, int age)
-        : m_name(name)
-        , m_age(age)
-    {
-    }
-
-    bool equals(const KeyedCodingTestObject& other) const
-    {
-        return (m_name == other.m_name) && (m_age == other.m_age);
-    }
-
-    String m_name;
-    int32_t m_age;
-};
-
-static bool operator==(const KeyedCodingTestObject& lObject, const KeyedCodingTestObject& rObject)
-{
-    return lObject.equals(rObject);
-}
-
-TEST(KeyedCoding, SetAndGetObject)
-{
-    const KeyedCodingTestObject user0("Noah", 28);
-    const KeyedCodingTestObject user1("Emma", 31);
-
-    auto encoder = WebCore::KeyedEncoder::encoder();
-    encoder->encodeObject("user0", user0, KeyedCodingTestObject::encode);
-    encoder->encodeObject("user1", user1, KeyedCodingTestObject::encode);
-    auto encodedBuffer = encoder->finishEncoding();
-
-    auto decoder = WebCore::KeyedDecoder::decoder(reinterpret_cast<const uint8_t*>(encodedBuffer->data()), encodedBuffer->size());
-    bool success;
-    KeyedCodingTestObject decodedUser0, decodedUser1;
-
-    success = decoder->decodeObject("user0", decodedUser0, KeyedCodingTestObject::decode);
-    EXPECT_TRUE(success);
-    EXPECT_EQ(decodedUser0, user0);
-
-    success = decoder->decodeObject("user1", decodedUser1, KeyedCodingTestObject::decode);
-    EXPECT_TRUE(success);
-    EXPECT_EQ(decodedUser1, user1);
-}
-
-TEST(KeyedCoding, SetAndGetObjects)
-{
-    Vector<KeyedCodingTestObject> users;
-    for (int i = 0; i < 10; i++)
-        users.append(KeyedCodingTestObject("username", i));
-
-    auto encoder = WebCore::KeyedEncoder::encoder();
-    encoder->encodeObjects("users", users.begin(), users.end(), KeyedCodingTestObject::encode);
-    auto encodedBuffer = encoder->finishEncoding();
-
-    auto decoder = WebCore::KeyedDecoder::decoder(reinterpret_cast<const uint8_t*>(encodedBuffer->data()), encodedBuffer->size());
-    Vector<KeyedCodingTestObject> decodedUsers;
-
-    bool success = decoder->decodeObjects("users", decodedUsers, KeyedCodingTestObject::decode);
-    EXPECT_TRUE(success);
-    EXPECT_EQ(users, decodedUsers);
-}
-}