Add display list fallback reason histograms for 2D canvas

third_party/WebKit/Source/platform/graphics/ImageBuffer.h

 /*
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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.
@@ skipping 77 matching lines @@
     bool wasDrawnToAfterSnapshot() const { return m_snapshotState == DrawnToAfterSnapshot; }
 
     void setFilterQuality(SkFilterQuality filterQuality) { m_surface->setFilterQuality(filterQuality); }
     void setIsHidden(bool hidden) { m_surface->setIsHidden(hidden); }
 
     // Called by subclasses of ImageBufferSurface to install a new canvas object.
     // Virtual for mocking
     virtual void resetCanvas(SkCanvas*) const;
 
     SkCanvas* canvas() const;
-    void disableDeferral() const;
+    void disableDeferral(DisableDeferralReason) const;
 
     // Called at the end of a task that rendered a whole frame
     void finalizeFrame(const FloatRect &dirtyRect);
     void didFinalizeFrame();
 
     bool isDirty();
 
     bool writePixels(const SkImageInfo&, const void* pixels, size_t rowBytes, int x, int y);
 
     void willOverwriteCanvas() { m_surface->willOverwriteCanvas(); }
 
     bool getImageData(Multiply, const IntRect&, WTF::ArrayBufferContents&) const;
 
     void putByteArray(Multiply, const unsigned char* source, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint);
 
     AffineTransform baseTransform() const { return AffineTransform(); }
     WebLayer* platformLayer() const;
 
     // FIXME: current implementations of this method have the restriction that they only work
     // with textures that are RGB or RGBA format, UNSIGNED_BYTE type and level 0, as specified in
     // Extensions3D::canUseCopyTextureCHROMIUM().
     // Destroys the TEXTURE_2D binding for the active texture unit of the passed context
     bool copyToPlatformTexture(WebGraphicsContext3D*, Platform3DObject, GLenum, GLenum, GLint, bool, bool);
 
     bool copyRenderingResultsFromDrawingBuffer(DrawingBuffer*, SourceDrawingBuffer);
 
-    void flush(); // process deferred draw commands immediately
-    void flushGpu(); // Like flush(), but flushes all the way down to the Gpu context if the surface is accelerated
+    void flush(FlushReason); // process deferred draw commands immediately
+    void flushGpu(FlushReason); // Like flush(), but flushes all the way down to the Gpu context if the surface is accelerated
 
     void notifySurfaceInvalid();
 
-    PassRefPtr<SkImage> newSkImageSnapshot(AccelerationHint) const;
-    PassRefPtr<Image> newImageSnapshot(AccelerationHint = PreferNoAcceleration) const;
+    PassRefPtr<SkImage> newSkImageSnapshot(AccelerationHint, SnapshotReason) const;
+    PassRefPtr<Image> newImageSnapshot(AccelerationHint = PreferNoAcceleration, SnapshotReason = SnapshotReasonUnknown) const;
 
     void draw(GraphicsContext&, const FloatRect&, const FloatRect*, SkXfermode::Mode);
 
     void updateGPUMemoryUsage() const;
     static intptr_t getGlobalGPUMemoryUsage() { return s_globalGPUMemoryUsage; }
     intptr_t getGPUMemoryUsage() { return m_gpuMemoryUsage; }
 
 protected:
     ImageBuffer(PassOwnPtr<ImageBufferSurface>);
 
@@ skipping 20 matching lines @@
     int height() const { return m_size.height(); }
     int width() const { return m_size.width(); }
 
     const unsigned char* m_data;
     const IntSize m_size;
 };
 
 } // namespace blink
 
 #endif // ImageBuffer_h