Add image-rendering: pixelated.

Source/core/rendering/ImageQualityController.cpp

 /*
  * 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 44 matching lines @@
         gImageQualityController->objectDestroyed(renderer);
         if (gImageQualityController->isEmpty()) {
             delete gImageQualityController;
             gImageQualityController = 0;
         }
     }
 }
 
 InterpolationQuality ImageQualityController::chooseInterpolationQuality(GraphicsContext* context, RenderObject* object, Image* image, const void* layer, const LayoutSize& layoutSize)
 {
+    // FIXME: This ImageRenderingPixelated should only be InterpolationNone when
+    // upscaling. It should be the same as ImageRenderingAuto when downscaling.
+    // See crbug.com/386944.
+    if (object->style()->imageRendering() == ImageRenderingPixelated)
+        return InterpolationNone;
+
     if (InterpolationDefault == InterpolationLow)
         return InterpolationLow;
 
     if (shouldPaintAtLowQuality(context, object, image, layer, layoutSize))
         return InterpolationLow;
 
     // For images that are potentially animated we paint them at medium quality.
     if (image && image->maybeAnimated())
         return InterpolationMedium;
 
@@ skipping 146 matching lines @@
     // This object has been resized to two different sizes while the timer
     // is active, so draw at low quality, set the flag for animated resizes and
     // the object to the list for high quality redraw.
     set(object, innerMap, layer, scaledLayoutSize);
     m_animatedResizeIsActive = true;
     restartTimer();
     return true;
 }
 
 } // namespace WebCore