Plumb in flag to enable antialiased clipping in HTML 5 Canvas

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 51 matching lines @@
 class HTMLImageElement;
 class HTMLVideoElement;
 class ImageData;
 class TextMetrics;
 
 typedef WillBeHeapHashMap<String, RefPtrWillBeMember<MutableStylePropertySet> > MutableStylePropertyMap;
 
 class CanvasRenderingContext2D final: public CanvasRenderingContext, public ScriptWrappable, public CanvasPathMethods {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassOwnPtrWillBeRawPtr<CanvasRenderingContext2D> create(HTMLCanvasElement* canvas, const Canvas2DContextAttributes* attrs, bool usesCSSCompatibilityParseMode)
+    static PassOwnPtrWillBeRawPtr<CanvasRenderingContext2D> create(HTMLCanvasElement* canvas, const Canvas2DContextAttributes* attrs, bool usesCSSCompatibilityParseMode, bool antialiasClips)
     {
-        return adoptPtrWillBeNoop(new CanvasRenderingContext2D(canvas, attrs, usesCSSCompatibilityParseMode));
+        return adoptPtrWillBeNoop(new CanvasRenderingContext2D(canvas, attrs, usesCSSCompatibilityParseMode, antialiasClips));
     }
     virtual ~CanvasRenderingContext2D();
 
     CanvasStyle* strokeStyle() const;
     void setStrokeStyle(PassRefPtrWillBeRawPtr<CanvasStyle>);
 
     CanvasStyle* fillStyle() const;
     void setFillStyle(PassRefPtrWillBeRawPtr<CanvasStyle>);
 
     float lineWidth() const;
@@ skipping 205 matching lines @@
         TextBaseline m_textBaseline;
         Direction m_direction;
 
         String m_unparsedFont;
         Font m_font;
         bool m_realizedFont;
 
         bool m_hasClip;
     };
 
-    CanvasRenderingContext2D(HTMLCanvasElement*, const Canvas2DContextAttributes* attrs, bool usesCSSCompatibilityParseMode);
+    CanvasRenderingContext2D(HTMLCanvasElement*, const Canvas2DContextAttributes* attrs, bool usesCSSCompatibilityParseMode, bool antialiasClips);
 
     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();
     bool shouldDrawShadows() const;
 
     void dispatchContextLostEvent(Timer<CanvasRenderingContext2D>*);
@@ skipping 51 matching lines @@
     virtual void setIsHidden(bool) override;
 
     virtual bool isTransformInvertible() const override { return state().m_invertibleCTM; }
 
     virtual blink::WebLayer* platformLayer() const override;
     TextDirection toTextDirection(Direction, RenderStyle** computedStyle = nullptr) const;
 
     WillBeHeapVector<OwnPtrWillBeMember<State> > m_stateStack;
     OwnPtrWillBeMember<HitRegionManager> m_hitRegionManager;
     bool m_usesCSSCompatibilityParseMode;
+    bool m_antialiasClips;
     bool m_hasAlpha;
     bool m_isContextLost;
     bool m_contextRestorable;
     Canvas2DContextStorage m_storageMode;
     MutableStylePropertyMap m_fetchedFonts;
     ListHashSet<String> m_fetchedFontsLRUList;
     unsigned m_tryRestoreContextAttemptCount;
     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