Remove support for -webkit-canvas and Document.getCSSCanvasContext.

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 574 matching lines @@
     // so tear down scope information upfront to avoid having stale references in the map.
     destroyTreeScopeData();
 
     removeDetachedChildren();
 
     // removeDetachedChildren() can access FormController.
     m_formController.clear();
 
     m_markers->clear();
 
-    m_cssCanvasElements.clear();
-
     // FIXME: consider using ActiveDOMObject.
     if (m_scriptedAnimationController)
         m_scriptedAnimationController->clearDocumentPointer();
     m_scriptedAnimationController.clear();
 
     m_scriptedIdleTaskController.clear();
 
     if (svgExtensions())
         accessSVGExtensions().pauseAnimations();
 
@@ skipping 4298 matching lines @@
     m_ranges.add(range);
 }
 
 void Document::detachRange(Range* range)
 {
     // We don't ASSERT m_ranges.contains(range) to allow us to call this
     // unconditionally to fix: https://bugs.webkit.org/show_bug.cgi?id=26044
     m_ranges.remove(range);
 }
 
-ScriptValue Document::getCSSCanvasContext(ScriptState* scriptState, const String& type, const String& name, int width, int height)
-{
-    HTMLCanvasElement& element = getCSSCanvasElement(name);
-    element.setSize(IntSize(width, height));
-    CanvasRenderingContext* context = element.getCanvasRenderingContext(type, CanvasContextCreationAttributes());
-    if (!context) {
-        return ScriptValue::createNull(scriptState);
-    }
-
-    return ScriptValue(scriptState, toV8(context, scriptState->context()->Global(), scriptState->isolate()));
-}
-
-HTMLCanvasElement& Document::getCSSCanvasElement(const String& name)
-{
-    RefPtrWillBeMember<HTMLCanvasElement>& element = m_cssCanvasElements.add(name, nullptr).storedValue->value;
-    if (!element) {
-        element = HTMLCanvasElement::create(*this);
-        element->setAccelerationDisabled(true);
-    }
-    return *element;
-}
-
 void Document::initDNSPrefetch()
 {
     Settings* settings = this->settings();
 
     m_haveExplicitlyDisabledDNSPrefetch = false;
     m_isDNSPrefetchEnabled = settings && settings->dnsPrefetchingEnabled() && securityOrigin()->protocol() == "http";
 
     // Inherit DNS prefetch opt-out from parent frame
     if (Document* parent = parentDocument()) {
         if (!parent->isDNSPrefetchEnabled())
@@ skipping 873 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     Document::WeakDocumentSet& set = Document::liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif