Make CanvasRenderingContext2D use SkCanvas directly

Source/platform/graphics/GraphicsContext.cpp

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google 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
@@ skipping 1502 matching lines @@
     clipRoundedRect(rect, SkRegion::kDifference_Op);
 }
 
 void GraphicsContext::clipRect(const SkRect& rect, AntiAliasingMode aa, SkRegion::Op op)
 {
     ASSERT(m_canvas);
     if (contextDisabled())
         return;
 
     if (op != SkRegion::kIntersect_Op && op != SkRegion::kReplace_Op)
-        mutableState()->setHasComplexClip();
+        setHasComplexClip();
 
     m_canvas->clipRect(rect, op, aa == AntiAliased);
 }
 
 void GraphicsContext::clipPath(const SkPath& path, AntiAliasingMode aa, SkRegion::Op op)
 {
     ASSERT(m_canvas);
     if (contextDisabled())
         return;
 
     if (!path.isRect(0) || (op != SkRegion::kIntersect_Op && op != SkRegion::kReplace_Op))
-        mutableState()->setHasComplexClip();
+        setHasComplexClip();
 
     m_canvas->clipPath(path, op, aa == AntiAliased);
 }
 
 void GraphicsContext::clipRRect(const SkRRect& rect, AntiAliasingMode aa, SkRegion::Op op)
 {
     ASSERT(m_canvas);
     if (contextDisabled())
         return;
 
     if (!rect.isRect() || (op != SkRegion::kIntersect_Op && op != SkRegion::kReplace_Op))
-        mutableState()->setHasComplexClip();
+        setHasComplexClip();
 
     m_canvas->clipRRect(rect, op, aa == AntiAliased);
 }
 
 void GraphicsContext::rotate(float angleInRadians)
 {
     ASSERT(m_canvas);
     if (contextDisabled())
         return;
 
@@ skipping 384 matching lines @@
     return initialSaveCount;
 }
 
 void GraphicsContext::setClient(GraphicsContextClient* client)
 {
     ASSERT(client == 0 || m_client == 0); // No clobbering
     m_client = client;
 }
 
 } // namespace blink