Use dictionaries for context creation attributes. Eliminate custom bindings.

Source/core/html/canvas/CanvasRenderingContext2D.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * 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
@@ skipping 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef CanvasRenderingContext2D_h
 #define CanvasRenderingContext2D_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "bindings/core/v8/UnionTypesCore.h"
 #include "core/css/CSSFontSelectorClient.h"
 #include "core/html/canvas/Canvas2DContextAttributes.h"
+#include "core/html/canvas/CanvasContextCreationAttributes.h"
 #include "core/html/canvas/CanvasPathMethods.h"
 #include "core/html/canvas/CanvasRenderingContext.h"
 #include "core/html/canvas/ClipList.h"
 #include "core/html/canvas/HitRegion.h"
 #include "core/svg/SVGMatrixTearOff.h"
 #include "platform/fonts/Font.h"
 #include "platform/graphics/Color.h"
 #include "platform/geometry/FloatSize.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/GraphicsTypes.h"
@@ skipping 20 matching lines @@
 class HTMLCanvasElement;
 class HTMLImageElement;
 class HTMLVideoElement;
 class ImageData;
 class TextMetrics;
 
 typedef HTMLImageElementOrHTMLVideoElementOrHTMLCanvasElementOrImageBitmap CanvasImageSourceUnion;
 
 typedef WillBeHeapHashMap<String, RefPtrWillBeMember<MutableStylePropertySet>> MutableStylePropertyMap;
 
+enum Canvas2DContextStorage {
+    PersistentStorage,
+    DiscardableStorage
+};
+
 class CanvasRenderingContext2D final: public CanvasRenderingContext, public ScriptWrappable, public CanvasPathMethods {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassOwnPtrWillBeRawPtr<CanvasRenderingContext2D> create(HTMLCanvasElement* canvas, const Canvas2DContextAttributes* attrs, Document& document)
+    static PassOwnPtrWillBeRawPtr<CanvasRenderingContext2D> create(HTMLCanvasElement* canvas, const CanvasContextCreationAttributes& attrs, Document& document)
     {
         return adoptPtrWillBeNoop(new CanvasRenderingContext2D(canvas, attrs, document));
     }
     virtual ~CanvasRenderingContext2D();
 
     void strokeStyle(StringOrCanvasGradientOrCanvasPattern&) const;
     void setStrokeStyle(const StringOrCanvasGradientOrCanvasPattern&);
 
     void fillStyle(StringOrCanvasGradientOrCanvasPattern&) const;
     void setFillStyle(const StringOrCanvasGradientOrCanvasPattern&);
@@ skipping 106 matching lines @@
     void strokeText(const String& text, float x, float y);
     void strokeText(const String& text, float x, float y, float maxWidth);
     PassRefPtrWillBeRawPtr<TextMetrics> measureText(const String& text);
 
     LineCap getLineCap() const { return state().m_lineCap; }
     LineJoin getLineJoin() const { return state().m_lineJoin; }
 
     bool imageSmoothingEnabled() const;
     void setImageSmoothingEnabled(bool);
 
-    PassRefPtrWillBeRawPtr<Canvas2DContextAttributes> getContextAttributes() const;
+    void getContextAttributes(Canvas2DContextAttributes&) const;
 
     void drawFocusIfNeeded(Element*);
     void drawFocusIfNeeded(Path2D*, Element*);
 
     void addHitRegion(const HitRegionOptions&, ExceptionState&);
     void removeHitRegion(const String& id);
     void clearHitRegions();
     HitRegion* hitRegionAtPoint(const LayoutPoint&);
     unsigned hitRegionsCount() const;
 
@@ skipping 58 matching lines @@
 
         String m_unparsedFont;
         Font m_font;
         bool m_realizedFont;
 
         bool m_hasClip;
 
         ClipList m_clipList;
     };
 
-    CanvasRenderingContext2D(HTMLCanvasElement*, const Canvas2DContextAttributes* attrs, Document&);
+    CanvasRenderingContext2D(HTMLCanvasElement*, const CanvasContextCreationAttributes& attrs, Document&);
 
     State& modifiableState() { ASSERT(!state().m_unrealizedSaveCount); return *m_stateStack.last(); }
     const State& state() const { return *m_stateStack.last(); }
 
     void applyLineDash() const;
     void setShadow(const FloatSize& offset, float blur, RGBA32 color);
     void applyShadow(ShadowMode = DrawShadowAndForeground);
     bool shouldDrawShadows() const;
 
     void dispatchContextLostEvent(Timer<CanvasRenderingContext2D>*);
@@ skipping 67 matching lines @@
     Timer<CanvasRenderingContext2D> m_dispatchContextLostEventTimer;
     Timer<CanvasRenderingContext2D> m_dispatchContextRestoredEventTimer;
     Timer<CanvasRenderingContext2D> m_tryRestoreContextEventTimer;
 };
 
 DEFINE_TYPE_CASTS(CanvasRenderingContext2D, CanvasRenderingContext, context, context->is2d(), context.is2d());
 
 } // namespace blink
 
 #endif // CanvasRenderingContext2D_h