Move overdraw tracking code from GraphicsContext to CanvasRenderingContext2D

Source/platform/graphics/GraphicsContextClient.h

Index: Source/platform/graphics/GraphicsContextClient.h
diff --git a/Source/platform/graphics/GraphicsContextClient.h b/Source/platform/graphics/GraphicsContextClient.h
deleted file mode 100644
index 2b05baf1aa97450ce7da1ab8f7112f75acd50bc6..0000000000000000000000000000000000000000
--- a/Source/platform/graphics/GraphicsContextClient.h
+++ /dev/null
@@ -1,68 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-//
-// The Chromium Authors can be found at
-// http://src.chromium.org/svn/trunk/src/AUTHORS
-//
-// 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
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//    * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY 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 GraphicsContextClient_h
-#define GraphicsContextClient_h
-
-#include "platform/PlatformExport.h"
-
-struct SkRect;
-class SkPaint;
-
-namespace blink {
-
-class GraphicsContext;
-
-class PLATFORM_EXPORT GraphicsContextClient {
-public:
-    enum DrawType {
-        UntransformedUnclippedFill,
-        Fill,
-        FillOrStroke
-    };
-
-    enum ImageType {
-        NoImage,
-        OpaqueImage,
-        NonOpaqueImage
-    };
-
-    void willDrawRect(GraphicsContext*, const SkRect&, const SkPaint*, ImageType, DrawType);
-    virtual ~GraphicsContextClient() { }
-protected:
-
-    // Called when the draw about to be executed will overwrite the entire canvas.
-    virtual void willOverwriteCanvas() = 0;
-};
-
-} // blink
-
-#endif