Use dictionaries for context creation attributes. Eliminate custom bindings.

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 127 matching lines @@
 #include "core/html/HTMLIFrameElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLLinkElement.h"
 #include "core/html/HTMLMetaElement.h"
 #include "core/html/HTMLScriptElement.h"
 #include "core/html/HTMLStyleElement.h"
 #include "core/html/HTMLTemplateElement.h"
 #include "core/html/HTMLTitleElement.h"
 #include "core/html/PluginDocument.h"
 #include "core/html/WindowNameCollection.h"
+#include "core/html/canvas/CanvasContextCreationAttributes.h"
 #include "core/html/canvas/CanvasRenderingContext.h"
 #include "core/html/canvas/CanvasRenderingContext2D.h"
 #include "core/html/canvas/WebGLRenderingContext.h"
 #include "core/html/forms/FormController.h"
 #include "core/html/imports/HTMLImportLoader.h"
 #include "core/html/imports/HTMLImportsController.h"
 #include "core/html/parser/HTMLDocumentParser.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/html/parser/NestingLevelIncrementer.h"
 #include "core/html/parser/TextResourceDecoder.h"
@@ skipping 4776 matching lines @@
 {
     // 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);
 }
 
 void Document::getCSSCanvasContext(const String& type, const String& name, int width, int height, CanvasRenderingContext2DOrWebGLRenderingContext& returnValue)
 {
     HTMLCanvasElement& element = getCSSCanvasElement(name);
     element.setSize(IntSize(width, height));
-    CanvasRenderingContext* context = element.getContext(type);
-    if (!context)
-        return;
-
-    if (context->is2d()) {
-        returnValue.setCanvasRenderingContext2D(toCanvasRenderingContext2D(context));
-    } else if (context->is3d()) {
-        returnValue.setWebGLRenderingContext(toWebGLRenderingContext(context));
-    }
+    element.getContext(type, CanvasContextCreationAttributes(), returnValue);
 }
 
 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;
@@ skipping 883 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = 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