commit 9ab51c78dac3e508d6416a2448978e6a2d08465a
author darin@apple.com <darin@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> Tue Jul 18 01:53:34 2017 +0000
committer darin@apple.com <darin@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> Tue Jul 18 01:53:34 2017 +0000
tree 2aa1364a71ed62de71cac673ed4cd5a8113cebf7
parent 4ab234a9e72f1dadc3540a82507065af9e91addb

Improve use of NeverDestroyed
https://bugs.webkit.org/show_bug.cgi?id=174348

Reviewed by Sam Weinig.

Source/JavaScriptCore:

* heap/MachineStackMarker.cpp:
* wasm/WasmMemory.cpp:
Removed unneeded includes of NeverDestroyed.h in files that do not make use
of NeverDestroyed.

Source/WebCore:

* Modules/encryptedmedia/MediaKeySession.cpp: Removed unneeded include of
NeverDestroyed.h.

* Modules/encryptedmedia/legacy/LegacyCDM.cpp:
(WebCore::installedCDMFactories): Use makeNeverDestroyed and a lambda rather
than a separate boolean for initialization.

* Modules/encryptedmedia/legacy/LegacyCDMSessionClearKey.cpp:
(WebCore::clearKeyVM): Removed unneeded use of NeverDestroyed to hold a
RefPtr. Simple to just use leakRef instead.

* Modules/gamepad/GamepadManager.cpp: Added an include of NeverDestroyed.h.

* Modules/indexeddb/IDBTransaction.cpp: Removed unneeded include of
NeverDestroyed.h.
* Modules/indexeddb/server/MemoryObjectStore.cpp: Ditto.

* Modules/mediasession/MediaSessionManager.cpp: Moved include of
NeverDestroyed.h here ...
* Modules/mediasession/MediaSessionManager.h: ... from here.

* Modules/mediasource/MediaSourceRegistry.cpp: Moved include of
NeverDestroyed.h here ...
* Modules/mediasource/MediaSourceRegistry.h: ... from here.

* Modules/mediasource/SourceBuffer.cpp: Removed unneeded include of
NeverDestroyed.h.

* Modules/plugins/QuickTimePluginReplacement.h: Initialize
m_scriptObject in the class definition.

* Modules/plugins/QuickTimePluginReplacement.mm:
(WebCore::QuickTimePluginReplacement::supportsMimeType): Use
makeNeverDestroyed and the HashSet constructor instead of a loop.
(WebCore::QuickTimePluginReplacement::supportsFileExtension): Ditto.
(WebCore::QuickTimePluginReplacement::QuickTimePluginReplacement): Did a
slight cleanup of the initializers.
(WebCore::QuickTimePluginReplacement::~QuickTimePluginReplacement): Added
a FIXME; unclear why there is code here at all.

* accessibility/AccessibilityRenderObject.cpp:
(WebCore::AccessibilityRenderObject::inheritsPresentationalRole): Use
makeNeverDestroyed and the Vector constructor instead of using empty
vector checks and Vector::add. Use std::any_of rather than Vector::contains
since we now are matching against pointers.

* bindings/scripts/CodeGeneratorJS.pm:
(GenerateEnumerationImplementationContent): Use const NeverDestroyed.

* bindings/scripts/test/JS/JSTestCallbackInterface.cpp:
* bindings/scripts/test/JS/JSTestObj.cpp:
* bindings/scripts/test/JS/JSTestStandaloneDictionary.cpp:
* bindings/scripts/test/JS/JSTestStandaloneEnumeration.cpp:
Regenerated.

* css/CSSProperty.cpp:
(WebCore::borderDirections): Removed unnecesssary use of NeverDestroyed
for a global object that has a trivial destructor.

* css/ElementRuleCollector.cpp:
(WebCore::leftToRightDeclaration): Removed unneeded use of NeverDestroyed to hold a
Ref. Simple to just use leakRef instead. Also use a lambda instead of an explicit
isEmpty check each time this is called.
(WebCore::rightToLeftDeclaration): Ditto.

* css/makeprop.pl: Removed unneeded include of NeverDestroyed.h and the
uneeded global emptyShorthand. Constructing an empty StylePropertyShorthand
is no less efficient than copying a global empty one was.

* dom/CustomElementReactionQueue.cpp: Added an include of NeverDestroyed.h.

* dom/DOMImplementation.cpp: Removed unneeded include of NeverDestroyed.h.
* dom/InputEvent.cpp: Ditto.

* dom/Microtasks.cpp: Moved include of NeverDestroyed.h here ...
* dom/Microtasks.h: ... from here.

* dom/MutationObserver.cpp: Added an include of NeverDestroyed.h.

* dom/ScopedEventQueue.cpp: Moved include of NeverDestroyed.h here ...
* dom/ScopedEventQueue.h: ... from here. Added Forward.h.

* dom/ScriptElement.cpp:
(WebCore::isLegacySupportedJavaScriptLanguage): Use makeNeverDestroyed
and the HashSet constructor rather than an isEmpty check and a lot of
add function calls. Also removed comments that don't have value any more,
with dubious no longer relevant claims about the behavior of old web browsers.
The function that calls this one already has sufficient comments about why we
hope some day this function can be eliminated.

* dom/SecurityContext.cpp: Removed unneeded include of NeverDestroyed.h.

* dom/make_names.pl:
(printFactoryCppFile): Instead of using a "populate" function, use a function
that creates as HashMap. Then use const auto and makeNeverDestroyed.
(printWrapperFactoryCppFile): Ditto.

* editing/AlternativeTextController.cpp:
(WebCore::markerTypesForAutocorrection): Use makeNeverDestroyed
and the Vector constructor rather than an isEmpty check and a lot of
append function calls.
(WebCore::markerTypesForReplacement): Ditto.
(WebCore::markerTypesForAppliedDictationAlternative): Ditto.

* editing/EditingStyle.cpp:
(WebCore::htmlElementEquivalents): Use const auto, makeNeverDestroyed,
the Vector constructor, and new rather than make_unique. Changed return
type to use const pointers rather than unique_ptr with non-const type.
(WebCore::EditingStyle::conflictsWithImplicitStyleOfElement): Updated
for the above change to htmlElementEquivalents.
(WebCore::htmlAttributeEquivalents): Same approach as above.
(WebCore::EditingStyle::conflictsWithImplicitStyleOfAttributes): Ditto.
(WebCore::elementMatchesAndPropertyIsNotInInlineStyleDecl): Take
references instead of pointers.
(WebCore::EditingStyle::mergeInlineAndImplicitStyleOfElement): Updated
for the above.

* editing/FormatBlockCommand.cpp:
(WebCore::isElementForFormatBlock): Use const auto, makeNeverDestroyed,
and the HashSet constructor rather than isEmpty and a lot of calls to add.
* editing/RemoveFormatCommand.cpp:
(WebCore::isElementForRemoveFormatCommand): Ditto.

* editing/ReplaceSelectionCommand.cpp:
(WebCore::isProhibitedParagraphChild): Use const auto, makeNeverDestroyed,
and a lambda, rather than isEmpty and a lot of calls to add.

* html/Autofill.cpp:
(WebCore::fieldNameMap): Changed return type to be const. Use const auto,
makeNeverDestroyed, a lambda, and an array of values rather than isEmpty
and a lot of calls to add. Stopped doing the ConstructFromLiteral
optimization here. (Easy to add it back if that is a mistake.)

* html/HTMLObjectElement.cpp:
(WebCore::isRecognizedTagName): Use const auto, makeNeverDestroyed, and
a lambda rather than isEmpty.

* html/HTMLStyleElement.cpp: Added include of NeverDestroyed.h.

* html/HTMLVideoElement.cpp: Removed uneeded include of NeverDestroyed.h.

* html/InputType.cpp:
(WebCore::createInputTypeFactoryMap): Replaced the populate function
with this create function.
(WebCore::InputType::create): Use const auto and makeNeverDestroyed
istead of isEmpty. Also put the map right where it is used so it's
not initialized in code path where not needed.

* html/parser/HTMLParserIdioms.cpp: Removed uneeded include of
NeverDestroyed.h.

* inspector/InspectorApplicationCacheAgent.cpp:
(WebCore::InspectorApplicationCacheAgent::networkStateChanged):
Merged into a single line.

* loader/ContentFilter.cpp:
(WebCore::blockedPageURL): Use const auto and makeNeverDestroyed
rather than std::call_once. Since this is a URL and has a non-thread-safe
reference count, this was not thread safe before, so no need to use the
more roundabout and less efficient idiom for its thread safety.

* loader/CrossOriginAccessControl.cpp:
(WebCore::isOnAccessControlResponseHeaderWhitelist): Deleted.
* loader/CrossOriginAccessControl.h: Deleted unused function
isOnAccessControlResponseHeaderWhitelist.

* loader/EmptyClients.cpp: Use leakRef instead of NeverDestroyed<Ref>.

* loader/appcache/ApplicationCacheStorage.cpp: Removed unneeded include of
NeverDestroyed.h.
* page/CaptionUserPreferences.cpp: Ditto.

* page/DebugPageOverlays.cpp:
(WebCore::touchEventRegionColors): Changed the return type to const, since
the callers do not modify the map. Use const auto, makeNeverDestroyed, and
a lambda rather than isEmpty and repeated calls to add.

* page/MainFrame.cpp: Removed unneeded include of NeverDestroyed.h.

* page/MemoryRelease.cpp:
(WebCore::releaseMemory): Use a function directly instead of calling it
inside a lambda.

* page/NavigatorBase.cpp:
(WebCore::NavigatorBase::onLine): Updated to call
NetworkStateNotifier::singleton.

* page/Page.cpp:
(WebCore::allPages): Made this a function instead of a global to use the
normal idiom for such globals.
(WebCore::Page::forEachPage): Updated for change to allPages.
(WebCore::networkStateChanged): Ditto. Also removed a bit of unnecessary
churn by using const AtomicString& instead of AtomicString.
(WebCore::Page::Page): Moved initialization of most data members to the
class definition. Removed initialiation of allPages. Updated the use of
NetworkStateNotifier for its new slightly changed  interface.
(WebCore::Page::~Page): Updated for change to allPages.
(WebCore::Page::clearPreviousItemFromAllPages): Ditto.
(WebCore::Page::updateStyleForAllPagesAfterGlobalChangeInEnvironment): Ditto.
(WebCore::Page::refreshPlugins): Ditto.

* page/Page.h: Moved initialization of most data members here.

* page/PerformanceUserTiming.cpp: Removed many unneded includes.
(WebCore::restrictedMarkFunction): Use const auto, makeNeverDestroyed, and
a lambda instead of isEmpty. Also use an array rather than std::array and
got rid fo the unneeded use of anonymous namespace since this is fine in
the top level WebCore namespace.
(WebCore::clearPerformanceEntries): Tweaked coding style.
(WebCore::UserTiming::mark): Ditto.
(WebCore::UserTiming::findExistingMarkStartTime): Got rid of double hash
table lookup by using find instead of using contains followed by get.
removed unneeded explicit cast to double. Tweaked coding style.
(WebCore::convertToEntrySequence): Tweaked coding style.
(WebCore::getEntrySequenceByName): Deleted.
(WebCore::UserTiming::getMarks): Call get directly instead of getEntrySequenceByName.
(WebCore::UserTiming::getMeasures): Ditto.

* page/RuntimeEnabledFeatures.cpp: Moved include of NeverDestroyed.h here ...
* page/RuntimeEnabledFeatures.h: ... from here. Added Forward.h and Noncopyable.h.

* platform/LocalizedStrings.cpp: Removed unneeded include of NeverDestroyed.h.

* platform/MIMETypeRegistry.cpp:
(WebCore::initializeSupportedImageMIMETypes): Added a missing const for a global
constant array.
(WebCore::initializeSupportedJavaScriptMIMETypes): Ditto.
(WebCore::initializeSupportedNonImageMimeTypes): Ditto.
(WebCore::typesForCommonExtension): Replaced the old mediaMIMETypeMap function
with this one. Moved the common media types array here since it's only used here.
Use const auto, makeNeverDestroyed, and a lambda instead of using an isEmpty check.
Iterate the array using a mdoern for loop. Use HashMap::ensure to avoid the
double hashing that the old code was doing. And moved the code to find an entry
in the map in here from the client functions.
(WebCore::MIMETypeRegistry::getMediaMIMETypeForExtension): Updated to use the
typesForCommonExtension, and changed logic to use this first, and only call
getMIMETypeForExtension for extensions not in the map. This gives the same
result but should be slightly more efficient.
(WebCore::MIMETypeRegistry::getMediaMIMETypesForExtension): Updated to use the
typesForCommonExtension function. Comment about strategy is now in there.
(WebCore::initializeUnsupportedTextMIMETypes): Added a missing const for a global
constant array. Also started using ASCIILiteral.

* platform/MainThreadSharedTimer.cpp: Moved include of NeverDestroyed.h here ...
* platform/MainThreadSharedTimer.h: ... from here. Added Forward.h.

* platform/SchemeRegistry.cpp:
(WebCore::add): Added helper functions to keep code below simpler.
(WebCore::makeNeverDestroyedSchemeSet): Ditto.
(WebCore::allBuiltinSchemes): Use const auto, makeNeverDestroyed, a lambda,
and the helper functions above, rather than isEmpty.
(WebCore::builtinLocalURLSchemes): Use const auto, makeNeverDestroyed, and
the HashSet constructor instead of isEmpty and add calls. Also changed the
return type to be const.
(WebCore::localURLSchemes): Copy the map using assignment instead of an
isEmpty function and a loop with calls to add.
(WebCore::builtinSecureSchemes): Use const auto, makeNeverDestroyed, and
the Vector constructor rather than isEmpty, repeated calls to append,
and shrinkToFit.
(WebCore::secureSchemes): Use auto and makeNeverDestroyedSchemeSet rather
than isEmpty and repeated calls to add.
(WebCore::builtinSchemesWithUniqueOrigins): More of the same.
(WebCore::schemesWithUniqueOrigins): Ditto.
(WebCore::builtinEmptyDocumentSchemes): Ditto.
(WebCore::emptyDocumentSchemes): Ditto.
(WebCore::schemesForbiddenFromDomainRelaxation): Ditto.
(WebCore::builtinCanDisplayOnlyIfCanRequestSchemes): Ditto.
(WebCore::canDisplayOnlyIfCanRequestSchemes): Ditto.
(WebCore::builtinCORSEnabledSchemes): Ditto.
(WebCore::CORSEnabledSchemes): Ditto.
(WebCore::SchemeRegistry::shouldTreatURLSchemeAsLocal): Replaced check for
empty string with check for null string, since that's slightly more efficient
for non-null, non-empty strings, and the hash table can handle empty strings
just fine.
(WebCore::SchemeRegistry::registerURLSchemeAsNoAccess): Added null check here.
(WebCore::SchemeRegistry::shouldTreatURLSchemeAsNoAccess): Ditto.
(WebCore::SchemeRegistry::registerURLSchemeAsDisplayIsolated): Ditto.
(WebCore::SchemeRegistry::shouldTreatURLSchemeAsDisplayIsolated): Ditto.
(WebCore::SchemeRegistry::registerURLSchemeAsSecure): Ditto.
(WebCore::SchemeRegistry::shouldTreatURLSchemeAsSecure): Ditto.
(WebCore::SchemeRegistry::registerURLSchemeAsEmptyDocument): Ditto.
(WebCore::SchemeRegistry::shouldLoadURLSchemeAsEmptyDocument): Ditto.
(WebCore::SchemeRegistry::setDomainRelaxationForbiddenForURLScheme): Ditto.
(WebCore::SchemeRegistry::isDomainRelaxationForbiddenForURLScheme): Ditto.
(WebCore::SchemeRegistry::canDisplayOnlyIfCanRequest): Ditto.
(WebCore::SchemeRegistry::registerAsCanDisplayOnlyIfCanRequest): Ditto.
(WebCore::SchemeRegistry::registerURLSchemeAsNotAllowingJavascriptURLs): Ditto.
(WebCore::SchemeRegistry::shouldTreatURLSchemeAsNotAllowingJavascriptURLs): Ditto.
(WebCore::SchemeRegistry::registerURLSchemeAsAllowingLocalStorageAccessInPrivateBrowsing): Ditto.
(WebCore::SchemeRegistry::allowsLocalStorageAccessInPrivateBrowsing): Ditto.
(WebCore::SchemeRegistry::registerURLSchemeAsAllowingDatabaseAccessInPrivateBrowsing): Ditto.
(WebCore::SchemeRegistry::allowsDatabaseAccessInPrivateBrowsing): Ditto.
(WebCore::SchemeRegistry::registerURLSchemeAsCORSEnabled): Ditto.
(WebCore::SchemeRegistry::shouldTreatURLSchemeAsCORSEnabled): Ditto.
(WebCore::SchemeRegistry::registerURLSchemeAsBypassingContentSecurityPolicy): Ditto.
(WebCore::SchemeRegistry::removeURLSchemeRegisteredAsBypassingContentSecurityPolicy): Ditto.
(WebCore::SchemeRegistry::schemeShouldBypassContentSecurityPolicy): Ditto.
(WebCore::SchemeRegistry::registerURLSchemeAsAlwaysRevalidated): Ditto.
(WebCore::SchemeRegistry::shouldAlwaysRevalidateURLScheme): Ditto.
(WebCore::SchemeRegistry::registerURLSchemeAsCachePartitioned): Ditto.
(WebCore::SchemeRegistry::shouldPartitionCacheForURLScheme): Ditto.
(WebCore::SchemeRegistry::isUserExtensionScheme): Tweaked #if a bit.
(WebCore::SchemeRegistry::isBuiltinScheme): Added null check.

* platform/cocoa/WebVideoFullscreenModelVideoElement.mm:
(WebVideoFullscreenModelVideoElement::observedEventNames): Use const auto,
makeNeverDestroyed, and the Vector constructor rather than a call to size
and then append eacn time this funciton is called.

* platform/gamepad/cocoa/GameControllerGamepadProvider.h: Moved include of
NeverDestroyed.h from here ...
* platform/gamepad/cocoa/GameControllerGamepadProvider.mm: ... to here.

* platform/gamepad/mac/HIDGamepadProvider.cpp: Moved include of
NeverDestroyed.h here ...
* platform/gamepad/mac/HIDGamepadProvider.h: ... from here.

* platform/graphics/FontCascade.cpp:
(WebCore::FontCascade::hasValidAverageCharWidth): Use const auto,
makeNeverDestroyed, and the HashSet constructor.

* platform/graphics/ImageBuffer.cpp:
(WebCore::ImageBuffer::transformColorSpace): Removed unneeded use of
NeverDestroyed<Vector<int>> here, instead using const std::array.

* platform/graphics/ImageBuffer.h: Changed platformTransformColorSpace to take
const std::array<uint8_t, 256>& instead of const Vector<int>&, since the whole
pointer of the argument is that it's a table to map bytes onto other bytes.

* platform/graphics/MediaPlaybackTarget.h: Removed unneeded include of
NeverDestroyed.h, unneeded unused noMediaPlaybackTargetContext function,
and unneeded include of MediaPlaybackTargetContext.h, forward declaring instead.
Made most functions in this class pure virtual instead of having default
implementations.

* platform/graphics/avfoundation/MediaPlaybackTargetMac.h: Added include
of MediaPlaybackTargetContext.h now that it was removed above.

* platform/graphics/avfoundation/MediaPlayerPrivateAVFoundation.cpp:
(WebCore::MediaPlayerPrivateAVFoundation::staticMIMETypeList): Use const auto,
makeNeverDestroyed, and the HashSet constructor.

* platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaStreamAVFObjC.mm:
(WebCore::MediaPlayerPrivateMediaStreamAVFObjC::isAvailable): Reversed the sense
of the boolean logic here to make this simpler and easier to read.
(WebCore::MediaPlayerPrivateMediaStreamAVFObjC::getSupportedTypes): Changed
the implementation here, which empties out the passed in hash set, to use
the clear function rather than assignment from a global empty hash set. Added
a FIXME because it seems peculiar that this would be considered OK.
(WebCore::MediaPlayerPrivateMediaStreamAVFObjC::supportsType): Used ? : to make
this a little more terse; I think it's clearer.

* platform/graphics/cairo/ImageBufferCairo.cpp:
(WebCore::ImageBuffer::platformTransformColorSpace): Updated for change to
argument type.

* platform/graphics/cg/ImageDecoderCG.cpp: Removed unneeded include of
NeverDestroyed.h.
(WebCore::appendImageSourceOption): Streamlined code using auto with
adoptCF; there is no need to write out the type of the RetainPtr.
(WebCore::imageSourceOptions): Instead of NeverDestroyed<RetainPtr>, just use
const auto and leakRef.
(WebCore::imageSourceAsyncOptions): Ditto.

* platform/graphics/gtk/GdkCairoUtilities.cpp:
(WebCore::getDefaultCairoFontOptions): Instead of using LazyNeverDestroyed
on a pointer, just use a global pointer. There is no need to use any kind
of NeverDestroyed on a type with a trivial destructor such as a pointer.

* platform/graphics/ios/FontCacheIOS.mm:
(WebCore::platformFontWithFamilySpecialCase): Instead of using
NeverDestroyed<RetainPtr> just use a raw pointer global.
* platform/graphics/mac/FontCacheMac.mm:
(WebCore::platformFontWithFamilySpecialCase): Ditto.

* platform/graphics/mac/MediaPlayerPrivateQTKit.mm:
(WebCore::createFileTypesSet): Return the HashSet instead of adding to it.
Use Objective-C for/in syntax for an NSArray, not C++ for syntax, although
it seems the C++ syntax was working fine.
(WebCore::mimeCommonTypesCache): Fixed return type so we won't copy the
HashMap every time this function is called. Use const auto and makeNeverDestroyed
instead of using a boolean to do one time initialization.
(WebCore::mimeModernTypesCache): Ditto.
(WebCore::MediaPlayerPrivateQTKit::disableUnsupportedTracks): Marked a
constant array const.

* platform/ios/Device.cpp:
(WebCore::deviceClass): Use a lambda to initialize a variable here instead
of using std::call_once. This function does not need to be thread safe.
(WebCore::deviceName): Use const NeverDestroyed instead of LazyNeverDestroyed
and std::call_once. This function does not need to be thread safe.

* platform/ios/DragImageIOS.mm: Make defaultLinkIndicatorOptions be a
constant instead of a variable.
(WebCore::cascadeForSystemFont): Added helper function.
(WebCore::createDragImageForLink): Use const auto and makeNeverDestroyed
instead of LazyNeverDestroyed and dispatch_once. This code does not need
to be thread safe since its arguments include, for example, a DOM element.

* platform/ios/LegacyTileLayerPool.h: Removed unneeded include of
NeverDestroyed.h.

* platform/ios/QuickLook.mm:
(WebCore::QLPreviewGetSupportedMIMETypesSet): Use a global raw pointer
instead of NeverDestroyed<RetainPtr<NSSet>>.
(WebCore::createQLPreviewProtocol): Deleted.
(WebCore::QLPreviewProtocol): Use a global raw pointer instead of
a NeverDestroyed<Vector<char>>. It's cleaner to use fastStrdup instead
of appending to an array, and less wasteful of memory too.

* platform/ios/WebCoreMotionManager.mm: Removed unneeded include of
NeverDestroyed.h.
* platform/ios/WebSQLiteDatabaseTrackerClient.h: Ditto.
* platform/mac/DragImageMac.mm: Ditto.
* platform/mediastream/CaptureDeviceManager.cpp: Ditto.
* platform/mediastream/RealtimeMediaSourceSupportedConstraints.cpp: Ditto.

* platform/mock/MockRealtimeMediaSource.cpp:
(WebCore::MockRealtimeMediaSource::audioDevices): Use auto,
makeNeverDestroyed, and a lambda instead of checking size each time.
(WebCore::MockRealtimeMediaSource::videoDevices): Ditto.

* platform/mock/mediasource/MockMediaPlayerMediaSource.cpp:
(WebCore::mimeTypeCache): Use const auto, makeNeverDestroyed, and the
HashSet constructor instead of an explicit boolean to initialize.

* platform/network/BlobRegistryImpl.cpp:
(WebCore::blobUtilityQueue): Use a global with a raw reference instead
of a NeverDestroyed<Ref>.

* platform/network/NetworkStateNotifier.cpp:
(WebCore::NetworkStateNotifier::singleton): Renamed this from
networkStateNotifier. We must have missed this when we changed to use the
singleton idiom consistently. Also changed to use normal NeverDestroyed
rather than using LazyNeverDestroyed and call_once, because this is not
used from multiple threads and has no special thread safety requirements.
(WebCore::NetworkStateNotifier::NetworkStateNotifier): Moved the constructor
here and construct the timer. Before the timer was used only on the Mac
platform but now it is there for all platforms.
(WebCore::NetworkStateNotifier::onLine): Moved function here from the header.
It's a littlel less trivial than before because it now triggers a call to
updateState as needed.
(WebCore::NetworkStateNotifier::addListener): Renamed from
addNetworkStateChangeListener since there is only one kind of listener and
the old name was too wordy. Changed to call the new startObserving function,
and guaranteed to call it onlh once. The platform-specific logic for iOS is
now inside the iOS version of that function instead of here.
(WebCore::NetworkStateNotifier::updateState): Moved here now that it is the
same for all platforms. The actual state updating is done in a function named
updateStateWithoutNotifying, which is implemented for each platform.
(WebCore::NetworkStateNotifier::updateStateSoon): New function which takes
advantage of the timer to coalesce network state updates.
(WebCore::NetworkStateNotifier::updateStateWithoutNotifying): Empty stub
version of this function.
(WebCore::NetworkStateNotifier::startObserving): Ditto.
(WebCore::NetworkStateNotifier::notifyNetworkStateChange): Deleted. Code from
this has moved into updateState.

* platform/network/NetworkStateNotifier.h: Greatly cut down what part of this
class is platform-specific.

* platform/network/ios/NetworkStateNotifierIOS.mm:
(-[WebNetworkStateObserver initWithBlock:]): Simplified this class so it
takes a block, rather than using a pointer to the C++ notifier and doing
WebThreadRun.
(-[WebNetworkStateObserver dealloc]): Ditto.
(-[WebNetworkStateObserver networkStateChanged:]): Ditto.
(WebCore::NetworkStateNotifier::updateStateWithoutNotifying):
This now calls isNetworkReachable.
(WebCore::NetworkStateNotifier::startObserving): Check the
Settings::shouldOptOutOfNetworkStateObservation function, and if it's OK
to observe, then create the observer. This code now takes care of the
WebThreadRun and calls updateStateSoon.
(WebCore::NetworkStateNotifier::NetworkStateNotifier): Deleted. The
constructor is now platform independent.
(WebCore::NetworkStateNotifier::~NetworkStateNotifier): Deleted. This
object is never destroyed so we should not write a destructor for it.
(WebCore::NetworkStateNotifier::registerObserverIfNecessary): Deleted.
Replaced by startObserving.
(WebCore::NetworkStateNotifier::onLine): Deleted. This function is now
platform-independent.
(WebCore::setOnLine): Deleted. The logic from this is now in
updateState and updateStateWithoutNotifying.

* platform/network/mac/NetworkStateNotifierMac.cpp:
(WebCore::NetworkStateNotifier::updateStateWithoutNotifying): Renamed
this from updateState and tightened up the code a bit. Also changed
to not assume anything. If there is an error, we leave m_isOnLine alone.
Default behavior is now in the platform-independent code, and the default
is to treat things as on-line if updateStateWithoutNotifying was called
and it was never able to update the state even once.
(WebCore::NetworkStateNotifier::startObserving): Moved most of the code
from the constructor into this function.
(WebCore::NetworkStateNotifier::dynamicStoreCallback): Deleted. This is
now a lambda inside startObserving.
(WebCore::NetworkStateNotifier::networkStateChangeTimerFired): Deleted.
This function is now platform-independent and is named updateState.

* platform/network/win/NetworkStateNotifierWin.cpp:
(WebCore::NetworkStateNotifier::updateStateWithoutNotifying): Renamed
from updateState and tightened the code up a bit. Also changed
to not assume anything. If there is an error, we leave m_isOnLine alone.
Default behavior is now in the platform-independent code, and the default
is to treat things as on-line if updateStateWithoutNotifying was called
and it was never able to update the state even once.
(WebCore::NetworkStateNotifier::addressChanged): Deleted.
This function is now platform-independent and is named updateState.
(WebCore::NetworkStateNotifier::addressChangeCallback): Renamed from
addrChangeCallback. Simplified by using the singleton function instead
of relying on the context pointer.
(WebCore::NetworkStateNotifier::startObserving): Moved most of the code
from the constructor here.

* platform/text/LocaleToScriptMappingDefault.cpp:
(WebCore::scriptNameToCode): Use makeNeverDestroyed.
(WebCore::localeToScriptCodeForFontSelection): Ditto.

* platform/text/ios/LocalizedDateCache.h: Moved include of
NeverDestroyed.h from here ...
* platform/text/ios/LocalizedDateCache.mm: ... to here.

* platform/wpe/RenderThemeWPE.cpp:
(WebCore::RenderTheme::singleton): Use a theme that is never destroyed
rather than Ref that is never destroyed.

* platform/wpe/RenderThemeWPE.h: Use friend NeverDestroyed rather than
a create function since RenderTheme is no longer reference counted.

* rendering/RenderTheme.h: Made RenderTheme no longer reference counted.

* rendering/RenderThemeGtk.cpp:
(WebCore::RenderThemeGtk::create): Deleted.
(WebCore::RenderTheme::singleton): Use a theme that is never destroyed
rather than Ref that is never destroyed.

* rendering/RenderThemeGtk.h: Use friend NeverDestroyed rather than
a create function since RenderTheme is no longer reference counted.
* rendering/RenderThemeIOS.h: Ditto.

* rendering/RenderThemeIOS.mm:
(WebCore::RenderThemeIOS::create): Deleted.
(WebCore::RenderTheme::singleton): Use a theme that is never destroyed
rather than Ref that is never destroyed.

* rendering/RenderThemeMac.h: Use friend NeverDestroyed rather than
a create function since RenderTheme is no longer reference counted.
Also marked a lot of functions final rather than override and initialized
data members in the class deifnition.

* rendering/RenderThemeMac.mm: Moved some SPI interfaces to the top of the
file. They should really go into SPI headers.
(-[WebCoreRenderThemeNotificationObserver init]): Removed the theme argument
here because the theme is a singleton and we don't need a pointer to it.
Add the observer here instead of doing it in the caller.
(-[WebCoreRenderThemeNotificationObserver systemColorsDidChange:]): Call
platformColorsDidChange through the singleton rather than using a pointer.
(-[WebCoreTextFieldCell _coreUIDrawOptionsWithFrame:inView:includeFocus:]):
Tightened up the code a bit by using CFAutorelease instead of using a
combination of NSMakeCollectable, autorelease, and a typecast to accomplish
the same thing.
(WebCore::RenderTheme::singleton): Use a theme that is never destroyed
rather than Ref that is never destroyed.
(WebCore::RenderThemeMac::create): Deleted.
(WebCore::RenderThemeMac::RenderThemeMac): Moved initialization into the
class definition and observing into the WebCoreRenderThemeNotificationObserver
init function.
(WebCore::RenderThemeMac::~RenderThemeMac): Deleted. No need for this since
the object will never be destroyed.
(WebCore::RenderThemeMac::mediaControlsBase64StringForIconNameAndType):
Removed an unnecessary conversion from C string literal to WTF::String and
then to NSString. Instead, just use an NSString literal.

* rendering/RenderThemeWin.cpp:
(WebCore::RenderThemeWin::create): Deleted.
(WebCore::RenderTheme::singleton): Use a theme that is never destroyed
rather than Ref that is never destroyed.

* rendering/RenderThemeWin.h: Use friend NeverDestroyed rather than
a create function since RenderTheme is no longer reference counted.

* rendering/svg/RenderSVGResource.cpp:
(WebCore::removeFromCacheAndInvalidateDependencies): Moved a global into
the code where it is used.

* svg/SVGAnimatedLength.cpp: Removed unneeded include of NeverDestroyed.h.

* svg/SVGAnimationElement.cpp:
(WebCore::SVGAnimationElement::isSupportedAttribute): Use const auto,
makeNeverDestroyed, a lambda, and the new HashSet::add overload instead of
an isEmpty check and lots of separate add function calls.
* svg/SVGClipPathElement.cpp:
(WebCore::SVGClipPathElement::isSupportedAttribute): Ditto.
* svg/SVGComponentTransferFunctionElement.cpp:
(WebCore::SVGComponentTransferFunctionElement::isSupportedAttribute): Ditto.
* svg/SVGCursorElement.cpp:
(WebCore::SVGCursorElement::isSupportedAttribute): Ditto.

* svg/SVGElement.cpp:
(WebCore::createAttributeNameToCSSPropertyIDMap): Replaced the populate
function with this create function.
(WebCore::createAttributeNameToAnimatedPropertyTypeMap): Ditto.
(WebCore::attributeNameToAnimatedPropertyTypeMap): Changed return type to
const reference. Use const auto and makeNeverDestroyed instead of using
isEmpty and a populate function.
(WebCore::createCSSPropertyWithSVGDOMNameToAnimatedPropertyTypeMap):
More of the same.
(WebCore::cssPropertyWithSVGDOMNameToAnimatedPropertyTypeMap): Ditto.
(WebCore::SVGElement::childShouldCreateRenderer): Use an array instead of
a HashSet since we are checking against only 3 or 4 values.
(WebCore::addQualifiedName): Deleted.
(WebCore::SVGElement::animatableAttributeForName): Use const auto,
makeNeverDestroyed, and a lambda to efficiently build the map in this function.
(WebCore::SVGElement::cssPropertyIdForSVGAttributeName): Use const auto and
makeNeverDestroyed instead of using isEmpty and a populate function.

* svg/SVGFilterElement.cpp:
(WebCore::SVGFilterElement::isSupportedAttribute): Use const auto,
makeNeverDestroyed, a lambda, and the new HashSet::add overload instead of
an isEmpty check and lots of separate add function calls.
* svg/SVGFilterPrimitiveStandardAttributes.cpp:
(WebCore::SVGFilterPrimitiveStandardAttributes::isSupportedAttribute): Ditto.
* svg/SVGForeignObjectElement.cpp:
(WebCore::SVGForeignObjectElement::isSupportedAttribute): Ditto.
* svg/SVGGElement.cpp:
(WebCore::SVGGElement::isSupportedAttribute): Ditto.
* svg/SVGGradientElement.cpp:
(WebCore::SVGGradientElement::isSupportedAttribute): Ditto.
* svg/SVGGraphicsElement.cpp:
(WebCore::SVGGraphicsElement::isSupportedAttribute): Ditto.
* svg/SVGImageElement.cpp:
(WebCore::SVGImageElement::isSupportedAttribute): Ditto.
* svg/SVGLangSpace.cpp:
(WebCore::addWithAndWithoutXMLPrefix): Added helper. Uses xmlAtom instead
of making our own NeverDestroyed local xmlPrefix.
(WebCore::SVGLangSpace::addSupportedAttributes): Rewrote to use helper.
* svg/SVGLineElement.cpp:
(WebCore::SVGLineElement::isSupportedAttribute): Use const auto,
makeNeverDestroyed, a lambda, and the new HashSet::add overload instead of
an isEmpty check and lots of separate add function calls.
* svg/SVGLinearGradientElement.cpp:
(WebCore::SVGLinearGradientElement::isSupportedAttribute): Ditto.
* svg/SVGMarkerElement.cpp:
(WebCore::SVGMarkerElement::isSupportedAttribute): Ditto.
* svg/SVGMaskElement.cpp:
(WebCore::SVGMaskElement::isSupportedAttribute): Ditto.
* svg/SVGPathElement.cpp:
(WebCore::SVGPathElement::isSupportedAttribute): Ditto.
* svg/SVGPatternElement.cpp:
(WebCore::SVGPatternElement::isSupportedAttribute): Ditto.
* svg/SVGRadialGradientElement.cpp:
(WebCore::SVGRadialGradientElement::isSupportedAttribute): Ditto.
* svg/SVGTextContentElement.cpp:
(WebCore::SVGTextContentElement::isSupportedAttribute): Ditto.
* svg/SVGTextPathElement.cpp:
(WebCore::SVGTextPathElement::isSupportedAttribute): Ditto.
* svg/animation/SVGSMILElement.cpp:
(WebCore::SVGSMILElement::isSupportedAttribute): Ditto.

* testing/MockContentFilterSettings.h: Removed unneeded include of
NeverDestroyed.h.

* testing/MockGamepadProvider.cpp: Moved include of
NeverDestroyed.h here ...
* testing/MockGamepadProvider.h: ... from here.

* testing/MockPreviewLoaderClient.h: Removed unneeded include of
NeverDestroyed.h.

* workers/Worker.cpp:
(WebCore::allWorkers): Changed this from a global to a function.
(WebCore::Worker::networkStateChanged): Updated for above change and
made this a member function.
(WebCore::Worker::Worker): Updated for above change and
change to NetworkStateNotifier.
(WebCore::Worker::~Worker): Ditto.
* workers/Worker.h: Made networkStateChanged a static member instead of
a friend since that is a cleaner way to give it access to private member
functions.

* xml/XPathFunctions.cpp:
(WebCore::XPath::createFunctionMap): Use create instead of populate style.
(WebCore::XPath::Function::create): Use const auto and makeNeverDestroyed
instead of an isEmpty check.

* xml/XPathParser.cpp:
(WebCore::XPath::createAxisNamesMap): Use create instead of populate style.
(WebCore::XPath::parseAxisName): Use const auto and makeNeverDestroyed
instead of an isEmpty check.

Source/WebKit:

* DatabaseProcess/DatabaseProcess.h: Removed unneeded include of
NeverDestroyed.h.
* NetworkProcess/cache/NetworkCacheKey.cpp: Ditto.

* NetworkProcess/capture/NetworkCaptureManager.cpp: Moved include of
NeverDestroyed.h here ...
* NetworkProcess/capture/NetworkCaptureManager.h: ... from here.

* PluginProcess/PluginProcess.cpp: Moved include of NeverDestroyed.h
here ...
* PluginProcess/PluginProcess.h: ... from here.

* Shared/API/Cocoa/_WKRemoteObjectInterface.mm:
(isContainerClass): Removed trivial inefficient use of
LazyNeverDestroyed<HashSet> to check against two classes.
Instead wrote out the boolean expression.

* Shared/mac/SecItemShim.cpp: Removed unneeded include of
NeverDestroyed.h.

* UIProcess/Cocoa/WebProcessPoolCocoa.mm:
(WebKit::WebProcessPool::platformInitialize): Call
installMemoryPressureHandler instead of WebMemoryPressureHandler::singleton.

* UIProcess/Gamepad/UIGamepadProvider.h: Removed unneeded include
of NeverDestroyed.h.

* UIProcess/Plugins/PluginProcessManager.cpp: Moved include of
NeverDestroyed.h here ...
* UIProcess/Plugins/PluginProcessManager.h: ... from here.

* UIProcess/WebInspectorProxy.cpp: Removed unneeded include
of NeverDestroyed.h.

* UIProcess/WebPageProxy.h: Added now-needed include of
MediaPlaybackTargetContext.h.

* UIProcess/WebPasteboardProxy.cpp: Moved include of
NeverDestroyed.h here ...
* UIProcess/WebPasteboardProxy.h: ... from here.

* UIProcess/ios/WebMemoryPressureHandlerIOS.h: Removed the
WebMemoryPressureHandler class from this header. Callers don't need to
know if there is a class. They simply indicate when it's time to install
the handler. Another way to put it is that this class had no functions
other than the singleton function.

* UIProcess/ios/WebMemoryPressureHandlerIOS.mm:
(WebKit::installMemoryPressureHandler): Replaced the class with this function.
It creates a dispatch source and then resumes it. To avoid having the source
look like a leak, we keep it in a global variable.

* WebProcess/Gamepad/WebGamepadProvider.h: Include Forward.h instead of
NeverDestroyed.h.

* WebProcess/WebCoreSupport/WebPasteboardOverrides.cpp: Moved include of
NeverDestroyed.h here ...
* WebProcess/WebCoreSupport/WebPasteboardOverrides.h: ... from here.

* WebProcess/WebCoreSupport/WebPlatformStrategies.h: Removed unneeded
include of NeverDestroyed.h.

Source/WebKitLegacy:

* Storage/StorageThread.cpp:
(WebCore::StorageThread::releaseFastMallocFreeMemoryInAllThreads):
Simplify code by using a modern for loop and passing a function without wrapping
it in a lambda.

Source/WebKitLegacy/mac:

* Misc/WebStringTruncator.mm:
(+[WebStringTruncator centerTruncateString:toWidth:]): Replace
NeverDestroyed<RetainPtr> with just an NSFont * global.

* Plugins/Hosted/NetscapePluginHostManager.h: Removed unneeded include of
NeverDestroyed.h.
* Storage/WebDatabaseManager.mm: Ditto.
* WebCoreSupport/WebFrameNetworkingContext.mm: Ditto.
* WebCoreSupport/WebPlatformStrategies.mm: Ditto.

* WebView/WebView.mm: Removed unneeded include of NetworkStateNotifier.h.
(aeDescFromJSValue): Removed double hashing by using the return value from
add rather than calling contains before calling add.

Source/WTF:

* wtf/HashSet.h: Added an overload of HashSet::add that takes an initializer list of
const references. This is handy to add a bunch of values all at once. Later we can
consider optimizing to grow the hash table only once instead of deciding whether to
grow repeatedly as we add each value.
(WTF::copyToVector): Changed to use std::copy, removing 4 of the 6 lines of code here.

* wtf/MemoryPressureHandler.cpp: Include NeverDestroyed.h here ...
* wtf/MemoryPressureHandler.h: ... not here.

* wtf/NeverDestroyed.h: Added the ability to have a const NeverDestroyed.
Added a makeNeverDestroyed function that deduces the type from the argument.
With auto, this can be used to avoid writing out a long type twice.

* wtf/ThreadingPthreads.cpp: Removed unneeded include of NeverDestroyed.h.
* wtf/text/AtomicString.cpp: Ditto.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@219595 268f45cc-cd09-0410-ab3c-d52691b4dbfc