Make image-rendering:pixelated use nearest neighbor when downscaling.

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 49 matching lines @@
     }
 }
 
 bool ImageQualityController::has(RenderObject* renderer)
 {
     return gImageQualityController && gImageQualityController->m_objectLayerSizeMap.contains(renderer);
 }
 
 InterpolationQuality ImageQualityController::chooseInterpolationQuality(GraphicsContext* context, RenderObject* object, Image* image, const void* layer, const LayoutSize& layoutSize)
 {
-    if (object->style()->imageRendering() == ImageRenderingPixelated
-        && image
-        && (layoutSize.width() > image->width() || layoutSize.height() > image->height() || layoutSize == image->size())) {
+    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 147 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 blink