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

public/platform/WebExternalTextureLayer.h

 /*
  * Copyright (C) 2011 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 44 matching lines @@
     // Sets whether this layer's texture has premultiplied alpha or not. Defaults to true.
     virtual void setPremultipliedAlpha(bool) = 0;
 
     // Sets whether the texture should be blended with the background color
     // at draw time. Defaults to false.
     virtual void setBlendBackgroundColor(bool) = 0;
 
     // Sets whether this context should be rate limited by the compositor. Rate limiting works by blocking
     // invalidate() and invalidateRect() calls if the compositor is too many frames behind.
     virtual void setRateLimitContext(bool) = 0;
+
+    // Sets whether this texture should use nearest neighbor interpolation as
+    // opposed to bilinear. Defaults to false.
+    virtual void setNearestNeighbor(bool) = 0;

[Justin Novosad, 2014/11/18 16:32:50]

I think this is no longer needed since you are now using mailbox.nearestNeighbor
to pass this parameter.

[jackhou1, 2014/12/01 07:00:08]

IIUC, having this should mean we don't need to reset the texture when
imageRendering changes. I've removed the m_imageBuffer->notifySurfaceInvalid();
in Canvas2DLayerBridge::setFilterLevel, so that this is actually the case.

 };
 
 } // namespace blink
 
 #endif // WebExternalTextureLayer_h