Eliminate ResourceBuffer and use SharedBuffer directly instead
https://bugs.webkit.org/show_bug.cgi?id=138174

Reviewed by Antti Koivisto.

Source/WebCore:

Refactoring, with test coverage across many existing tests.

* CMakeLists.txt: Deleted ResourceBuffer.cpp.

* WebCore.exp.in: Removed ResourceBuffer-related symbols, and updated symbol
for one function that used to take a PassRefPtr but now takes a reference instead.

* WebCore.vcxproj/WebCore.vcxproj: Deleted ResourceBuffer.cpp/.h.
* WebCore.vcxproj/WebCore.vcxproj.filters: Ditto.
* WebCore.xcodeproj/project.pbxproj: Deleted ResourceBuffer.mm/.cpp/.h.

* bindings/objc/DOMUIKitExtensions.mm:
(-[DOMHTMLImageElement dataRepresentation:]): Use SharedBuffer directly.
* editing/ios/EditorIOS.mm:
(WebCore::Editor::writeImageToPasteboard): Ditto.
* editing/mac/EditorMac.mm:
(WebCore::Editor::writeImageToPasteboard): Ditto.

* html/ImageDocument.cpp:
(WebCore::ImageDocument::updateDuringParsing): Use SharedBuffer directly, and
also pass a reference only if non-null rather than passing a pointer.
(WebCore::ImageDocument::finishedParsing): Ditto. Added a missing null check.

* inspector/InspectorPageAgent.cpp:
(WebCore::InspectorPageAgent::cachedResourceContent): Use SharedBuffer directly.
(WebCore::InspectorPageAgent::mainResourceContent): Ditto.
* inspector/InspectorResourceAgent.cpp:
(WebCore::InspectorResourceAgent::didFinishLoading): Ditto.
(WebCore::InspectorResourceAgent::didFailLoading): Ditto.

* loader/DocumentLoader.cpp:
(WebCore::DocumentLoader::mainResourceData): Use SharedBuffer directly,
and use the copy function rather than a hand-written alternative.
(WebCore::DocumentLoader::maybeCreateArchive): Ditto.
(WebCore::DocumentLoader::mainResource): Ditto.
(WebCore::DocumentLoader::subresource): Ditto.
(WebCore::DocumentLoader::maybeFinishLoadingMultipartContent): Ditto.

* loader/DocumentLoader.h: Changed mainResourceData to return a
PassRefPtr<SharedBuffer>. Would be better if it returned a SharedBuffer&,
but it currently returns a newly created buffer when there is substitute
data and can also return null, even though many callers assume it will not!

* loader/MediaResourceLoader.cpp:
(WebCore::MediaResourceLoader::dataReceived): Removed call to unused client
function bufferReceived.
(WebCore::MediaResourceLoader::notifyFinished): Removed unused buffer
argument to client function loadFinished.

* loader/ResourceBuffer.cpp: Removed.
* loader/ResourceBuffer.h: Removed.

* loader/ResourceLoader.cpp:
(WebCore::ResourceLoader::addDataOrBuffer): Use SharedBuffer directly.

* loader/ResourceLoader.h:
(WebCore::ResourceLoader::resourceData): Use SharedBuffer.

* loader/SubresourceLoader.cpp:
(WebCore::SubresourceLoader::didReceiveResponse): Use SharedBuffer.
(WebCore::SubresourceLoader::didReceiveDataOrBuffer): Ditto.

* loader/TextTrackLoader.cpp:
(WebCore::TextTrackLoader::processNewCueData): Use SharedBuffer.
* loader/appcache/ApplicationCacheGroup.cpp:
(WebCore::ApplicationCacheGroup::finishedLoadingMainResource): Ditto.
* loader/archive/cf/LegacyWebArchive.cpp:
(WebCore::LegacyWebArchive::create): Ditto.

* loader/cache/CachedCSSStyleSheet.cpp:
(WebCore::CachedCSSStyleSheet::finishLoading): Use SharedBuffer.
* loader/cache/CachedCSSStyleSheet.h: Ditto.
* loader/cache/CachedFont.cpp:
(WebCore::CachedFont::finishLoading): Ditto.
(WebCore::CachedFont::ensureCustomFontData): Ditto.
* loader/cache/CachedFont.h: Ditto.

* loader/cache/CachedImage.cpp:
(WebCore::CachedImage::didAddClient): Use SharedBuffer.
(WebCore::CachedImage::didRemoveClient): Ditto.
(WebCore::CachedImage::addIncrementalDataBuffer): Ditto. Changed to take
a reference rather than a pointer.
(WebCore::CachedImage::addDataBuffer): Ditto. Also added call through
to base class and changed to take a reference rather than a pointer.
(WebCore::CachedImage::addData): Ditto. Also added call through to base class.
(WebCore::CachedImage::finishLoading): Ditto.
* loader/cache/CachedImage.h: Ditto. Also changed the type of some bit fields
to be unsigned instead of unsigend char.

* loader/cache/CachedRawResource.cpp:
(WebCore::CachedRawResource::calculateIncrementalDataChunk): Use SharedBuffer.
(WebCore::CachedRawResource::addDataBuffer): Ditto. Changed to take
a reference rather than a pointer.
(WebCore::CachedRawResource::addData): Ditto.
(WebCore::CachedRawResource::finishLoading): Ditto.
(WebCore::CachedRawResource::canReuse): Ditto.
* loader/cache/CachedRawResource.h: Ditto.

* loader/cache/CachedResource.cpp:
(WebCore::CachedResource::CachedResource): Reordered data members due to change
in header.
(WebCore::CachedResource::addDataBuffer): Changed argument type.
(WebCore::CachedResource::finishLoading): Ditto.
(WebCore::CachedResource::didAddClient): Refactored to eliminate one extra hash
table lookup by using the return value from the remove function.
(WebCore::CachedResource::addClientToSet): Use std::make_unique directly instead
of using a function named "schedule" to allocate the callback object.
(WebCore::CachedResource::Callback::Callback): Changed function and data member
name.
(WebCore::CachedResource::Callback::cancel): Ditto.
(WebCore::CachedResource::Callback::timerFired): Ditto.
(WebCore::CachedResource::tryReplaceEncodedData): Changed to take a SharedBuffer&.

* loader/cache/CachedResource.h: Changed types to use SharedBuffer. Also made most
data members and one function member private instead of protected. Also renamed the
CachedResource::CachedResourceCallback function CachedResource::Callback and moved
its definition out of the CachedResource class definition.

* loader/cache/CachedResourceClient.h: Removed unneeded include.

* loader/cache/CachedSVGDocument.cpp:
(WebCore::CachedSVGDocument::finishLoading): Use SharedBuffer.

* loader/cache/CachedSVGDocument.h: Ditto. Made data members private.

* loader/cache/CachedScript.cpp:
(WebCore::CachedScript::finishLoading): Use SharedBuffer.
* loader/cache/CachedScript.h: Ditto. Also fixed indenting and removed unneeded
forward declaration.

* loader/cache/CachedTextTrack.cpp:
(WebCore::CachedTextTrack::updateData): Added, so that finishLoading does not
call addDataBuffer.
(WebCore::CachedTextTrack::addDataBuffer): Take SharedBuffer, call updateData.
(WebCore::CachedTextTrack::finishLoading): Ditto.
* loader/cache/CachedTextTrack.h: Take out unneeded explicit override of the
destructor. Updated for above changes.

* loader/cache/CachedXSLStyleSheet.cpp:
(WebCore::CachedXSLStyleSheet::finishLoading): Updated to use SharedBuffer.
* loader/cache/CachedXSLStyleSheet.h: Took out unneeded includes, made everything
private rather than protected. Added an explicit virtual constructor so we can
compile without knowing how to ref/deref TextResourceDecoder.

* loader/cf/SubresourceLoaderCF.cpp:
(WebCore::SubresourceLoader::didReceiveDataArray): Updated to use SharedBuffer
and to call addDataBuffer only if there is a new data buffer.

* loader/cocoa/DiskCacheMonitorCocoa.h: Use SharedBuffer& instead of PassRefPtr.
* loader/cocoa/DiskCacheMonitorCocoa.mm:
(WebCore::DiskCacheMonitor::DiskCacheMonitor): Ditto.
(WebCore::DiskCacheMonitor::resourceBecameFileBacked): Ditto.

* loader/icon/IconLoader.cpp:
(WebCore::IconLoader::notifyFinished): Use SharedBuffer* instead of
RefPtr<ResourceBuffer>.

* loader/mac/ResourceBuffer.mm: Removed.

* loader/mac/ResourceLoaderMac.mm:
(WebCore::ResourceLoader::didReceiveDataArray): Use SharedBuffer.

* platform/SharedBuffer.cpp:
(WebCore::SharedBuffer::clear): Use a modern for loop.
(WebCore::SharedBuffer::copy): Return a PassRef instead of a PassRefPtr, since
this never returns null. Use modern for loops.
(WebCore::SharedBuffer::copyBufferAndClear): Use a modern for loop.

* platform/SharedBuffer.h: Changed copy to return PassRef instead of PassRefPtr.
Changed tryReplaceContentsWithPlatformBuffer to take a reference rather than
a pointer.

* platform/cf/SharedBufferCF.cpp:
(WebCore::SharedBuffer::tryReplaceContentsWithPlatformBuffer): Take a reference
instead of a pointer.

* platform/graphics/PlatformMediaResourceLoader.h: Removed unused function
bufferReceived and unneeded buffer argument from loadFinished. Also marked the
constructor explicit.

* platform/graphics/avfoundation/cf/WebCoreAVCFResourceLoader.cpp:
Removed include of ResourceBuffer.h.
* platform/graphics/avfoundation/objc/WebCoreAVFResourceLoader.mm:
(WebCore::WebCoreAVFResourceLoader::fulfillRequestWithResource): Use
SharedBuffer directly.

* platform/graphics/gstreamer/WebKitWebSourceGStreamer.cpp:
(CachedResourceStreamingClient::loadFinished): Updated for change to
PlatformMediaResourceLoaderClient.

* platform/mac/PasteboardMac.mm: Removed include of ResourceBuffer.h.

* platform/soup/SharedBufferSoup.cpp: Removed unused, unneeded
tryReplaceContentsWithPlatformBuffer function.

Source/WebKit/mac:

* WebView/WebDataSource.mm:
(-[WebDataSource data]): Use SharedBuffer directly.
* WebView/WebHTMLView.mm:
(-[WebHTMLView namesOfPromisedFilesDroppedAtDestination:]): Ditto.

Source/WebKit/win:

* WebDataSource.cpp:
(WebDataSource::data): Use SharedBuffer directly.
(WebDataSource::subresourceForURL): Ditto.

Source/WebKit2:

* CMakeLists.txt: Removed WebResourceBuffer.cpp.

* NetworkProcess/NetworkResourceLoader.cpp:
(WebKit::NetworkResourceLoader::sendBuffer): Use a reference instead of pointer.
* NetworkProcess/NetworkResourceLoader.h: Ditto.
* NetworkProcess/mac/NetworkDiskCacheMonitor.h: Ditto.
* NetworkProcess/mac/NetworkDiskCacheMonitor.mm:
(WebKit::NetworkDiskCacheMonitor::resourceBecameFileBacked): Ditto.
* NetworkProcess/mac/NetworkResourceLoaderMac.mm:
(WebKit::NetworkResourceLoader::tryGetShareableHandleFromSharedBuffer): Ditto.

* Shared/WebResourceBuffer.cpp: Removed.
* Shared/WebResourceBuffer.h: Removed.

* WebKit2.xcodeproj/project.pbxproj: Removed WebResourceBuffer.cpp/h.

* WebProcess/Network/NetworkProcessConnection.cpp: Removed unneeded includes.
(WebKit::NetworkProcessConnection::didCacheResource): Use a reference instead
of a pointer.

* WebProcess/Network/WebResourceLoadScheduler.cpp: Removed unneeded include.
* WebProcess/Network/WebResourceLoader.cpp: Ditto.
* WebProcess/Network/WebResourceLoader.h: Ditto.
* WebProcess/WebCoreSupport/WebFrameLoaderClient.cpp: Ditto.
(WebKit::WebFrameLoaderClient::finishedLoading): Use SharedBuffer directly.
* WebProcess/WebPage/WebFrame.cpp:
(WebKit::WebFrame::source): Ditto.

* WebProcess/WebPage/WebPage.cpp:
(WebKit::WebPage::runJavaScriptInMainFrame): Refactored to make the relationship
between the buffer and the DataReference clearer and to avoid having a long-lived
DataReference pointing to an underlying buffer with unclear lifetime.
(WebKit::WebPage::getContentsAsString): Ditto.
(WebKit::WebPage::getSelectionAsWebArchiveData): Ditto.
(WebKit::WebPage::getMainResourceDataOfFrame): Ditto. Also use SharedBuffer directly.
(WebKit::WebPage::getResourceDataFromFrame): Ditto.
(WebKit::WebPage::getWebArchiveOfFrame): Ditto.

* WebProcess/WebPage/ios/WebPageIOS.mm:
(WebKit::containingLinkElement): Use elementLineage.
(WebKit::WebPage::performActionOnElement): Use references and SharedBuffer.
ALso did a bit of other cleanup in here.
(WebKit::isAssistableElement): Take Element& instead of Node*, since that's what
the caller has.
(WebKit::nextAssistableElement): Changed name to match what the function does.
Added an obviously-missing check on the startNode argument. Updated for change
to isAssistableElement above. Take a Page& instead of a Page*.
(WebKit::hasAssistableElement): Changed name to match what the function does.
Updated for change to nextAssistableElement above. Took out incorrect comparison
of a C++ pointer to the Objective-C object pointer nil. Take a Page& instead of a Page*.
(WebKit::WebPage::focusNextAssistedNode): Updated for above changes.
(WebKit::WebPage::getAssistedNodeInformation): Updated for above changes.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@175406 268f45cc-cd09-0410-ab3c-d52691b4dbfc