Remove PaintCanvas::writePixels

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 78 matching lines @@
 
   // Like flush, but flushes all the way down to the GPU context if the surface
   // uses the GPU.
   virtual void FlushGpu(FlushReason reason) { Flush(reason); }
 
   virtual void PrepareSurfaceForPaintingIfNeeded() {}
   virtual bool WritePixels(const SkImageInfo& orig_info,
                            const void* pixels,
                            size_t row_bytes,
                            int x,
-                           int y);
+                           int y) = 0;
 
   // May return nullptr if the surface is GPU-backed and the GPU context was
   // lost.
   virtual sk_sp<SkImage> NewImageSnapshot(AccelerationHint, SnapshotReason) = 0;
 
   OpacityMode GetOpacityMode() const { return opacity_mode_; }
   const IntSize& size() const { return size_; }
   const CanvasColorParams& color_params() const { return color_params_; }
   void NotifyIsValidChanged(bool is_valid) const;
 
  protected:
   ImageBufferSurface(const IntSize&, OpacityMode, const CanvasColorParams&);
   void Clear();
 
  private:
   OpacityMode opacity_mode_;
   IntSize size_;
   CanvasColorParams color_params_;
 };
 
 }  // namespace blink
 
 #endif