Create a GraphicsContext from a DisplayList.

Source/platform/graphics/DisplayList.h

 /*
  * 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 38 matching lines @@
 public:
     static PassRefPtr<DisplayList> create(const FloatRect& bounds)
     {
         return adoptRef(new DisplayList(bounds));
     }
 
     virtual ~DisplayList() { }
 
     const FloatRect& bounds() const { return m_bounds; }
 
-    // This entry point will return 0 when the DisplayList is in the
-    // midst of recording (i.e., between a beginRecording/endRecording pair)
+    // This entry point will return 0 when the DisplayList is in the midst of
+    // recording (i.e., between a GraphicsContext beginRecording/endRecording pair)
     // and if no recording has ever been completed. Otherwise it will return
     // the picture created by the last endRecording call.
     SkPicture* picture() const { return m_picture.get(); }
     void setPicture(SkPicture* picture) { m_picture = adoptRef(picture); }
 
     // FIXME: Need unit testing of these methods and their effect
     const SkMatrix& transform() const { return m_transform; }
     void setTransform(const SkMatrix& transform) { m_transform = transform; }
     void setTransformFromPaintOffset(const LayoutPoint& paintOffset)
     {
@@ skipping 18 matching lines @@
 
     FloatRect m_bounds;
     SkMatrix m_transform;
     SkRect m_clip; // TODO: Do we need to support other types of clips here?
     RefPtr<SkPicture> m_picture;
 };
 
 } // namespace blink
 
 #endif // DisplayList_h