Add some plumbing for the color management of canvases

third_party/WebKit/Source/platform/graphics/ImageBufferSurface.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 24 matching lines @@
 #include "platform/geometry/IntSize.h"
 #include "platform/graphics/GraphicsTypes.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/PassRefPtr.h"
 
 class SkBitmap;
 class SkCanvas;
+class SkColorSpace;
 class SkImage;
 struct SkImageInfo;
 class SkPicture;
 
 namespace blink {
 
 class ImageBuffer;
 class WebLayer;
 class FloatRect;
 class GraphicsContext;
@@ skipping 24 matching lines @@
     virtual void flush(FlushReason); // Execute all deferred rendering immediately
     virtual void flushGpu(FlushReason reason) { flush(reason); } // Like flush, but flushes all the way down to the GPU context if the surface uses the GPU
     virtual void prepareSurfaceForPaintingIfNeeded() { }
     virtual bool writePixels(const SkImageInfo& origInfo, const void* pixels, size_t rowBytes, int x, int y);
 
     // May return nullptr if the surface is GPU-backed and the GPU context was lost.
     virtual PassRefPtr<SkImage> newImageSnapshot(AccelerationHint, SnapshotReason) = 0;
 
     OpacityMode getOpacityMode() const { return m_opacityMode; }
     const IntSize& size() const { return m_size; }
+    const sk_sp<SkColorSpace> colorSpace() const { return m_colorSpace; }
     void notifyIsValidChanged(bool isValid) const;
 
 protected:
-    ImageBufferSurface(const IntSize&, OpacityMode);
+    ImageBufferSurface(const IntSize&, OpacityMode, sk_sp<SkColorSpace>);
     void clear();
 
 private:
     OpacityMode m_opacityMode;
     IntSize m_size;
+    sk_sp<SkColorSpace> m_colorSpace;
 };
 
 } // namespace blink
 
 #endif