Add rendering context and rendering 2D context to OffscreenCanvas

third_party/WebKit/Source/core/html/canvas/CanvasRenderingContext.h

 /*
  * Copyright (C) 2009 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 10 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef CanvasRenderingContext_h
 #define CanvasRenderingContext_h
 
 #include "core/CoreExport.h"
 #include "core/html/HTMLCanvasElement.h"
-#include "platform/heap/Handle.h"
 #include "wtf/HashSet.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/text/StringHash.h"
 
 class SkCanvas;
 
 namespace blink { class WebLayer; }
 
 namespace blink {
 
@@ skipping 77 matching lines @@
 
     // ImageBitmap-specific interface
     virtual bool paint(GraphicsContext&, const IntRect&) { return false; }
 
     bool wouldTaintOrigin(CanvasImageSource*);
     void didMoveToNewDocument(Document*);
 
 protected:
     CanvasRenderingContext(HTMLCanvasElement*);
     DECLARE_VIRTUAL_TRACE();
-
     virtual void stop() = 0;
 
 private:
     RawPtrWillBeMember<HTMLCanvasElement> m_canvas;
     HashSet<String> m_cleanURLs;
     HashSet<String> m_dirtyURLs;
 };
 
 } // namespace blink
 
 #endif