Make CanvasRenderingContext2D use SkCanvas directly

Source/core/html/canvas/ClipList.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ClipList_h
 #define ClipList_h
 
 #include "platform/graphics/GraphicsTypes.h"
-#include "platform/graphics/Path.h"
 #include "wtf/Vector.h"
 
+class SkCanvas;
+class SkPath;
+
 namespace blink {
 
-class GraphicsContext;
 class AffineTransform;
 
 class ClipList {
 public:
     ClipList() { }
     ClipList(const ClipList&);
     ~ClipList() { }
 
-    void clipPath(const Path&, WindRule, AntiAliasingMode, const AffineTransform&);
-    void playback(GraphicsContext*) const;
+    void clipPath(const SkPath&, AntiAliasingMode, const SkMatrix&);
+    void playback(SkCanvas*) const;
 
 private:
 
     struct ClipOp {
-        Path m_path;
+        SkPath m_path;
         AntiAliasingMode m_antiAliasingMode;
-        WindRule m_windRule;
 
         ClipOp();
         ClipOp(const ClipOp&);
     };
 
     // Number of clip ops that can be stored in a ClipList without resorting to dynamic allocation
     static const size_t cInlineClipOpCapacity = 4;
 
     WTF::Vector<ClipOp, cInlineClipOpCapacity> m_clipList;
 };
 
 } // namespace blink
 
 #endif