Implement image-rendering:pixelated for accelerated 2D canvases.

Source/platform/graphics/ImageBufferSurface.h

Index: Source/platform/graphics/ImageBufferSurface.h
diff --git a/Source/platform/graphics/ImageBufferSurface.h b/Source/platform/graphics/ImageBufferSurface.h
index 242a89d00c0b8b74cb52cf70dc15193977cd2ab7..bfce4441fe73ea6eb414be2d3fbda29d618b646c 100644
--- a/Source/platform/graphics/ImageBufferSurface.h
+++ b/Source/platform/graphics/ImageBufferSurface.h
@@ -70,6 +70,7 @@ public:
     virtual const SkBitmap& cachedBitmap() const;
     virtual void invalidateCachedBitmap() { }
     virtual void updateCachedBitmapIfNeeded() { }
+    virtual void setNearestNeighbor(bool) { }
     virtual void setIsHidden(bool) { }
     virtual void setImageBuffer(ImageBuffer*) { }
     virtual PassRefPtr<SkPicture> getPicture();