Don't anti-alias backgrounds of images.

Source/core/rendering/RenderImage.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved.
  *
@@ skipping 262 matching lines @@
 void RenderImage::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     ImagePainter(*this).paintReplaced(paintInfo, paintOffset);
 }
 
 void RenderImage::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     ImagePainter(*this).paint(paintInfo, paintOffset);
 }
 
+void RenderImage::paintBoxDecorationBackground(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
+{
+    ImagePainter(*this).paintBoxDecorationBackground(paintInfo, paintOffset);
+}
+
 void RenderImage::areaElementFocusChanged(HTMLAreaElement* areaElement)
 {
     ASSERT(areaElement->imageElement() == node());
 
     Path path = areaElement->computePath(this);
     if (path.isEmpty())
         return;
 
     RenderStyle* areaElementStyle = areaElement->computedStyle();
     unsigned short outlineWidth = areaElementStyle->outlineWidth();
@@ skipping 166 matching lines @@
         return 0;
 
     ImageResource* cachedImage = m_imageResource->cachedImage();
     if (cachedImage && cachedImage->image() && cachedImage->image()->isSVGImage())
         return toSVGImage(cachedImage->image())->embeddedContentBox();
 
     return 0;
 }
 
 } // namespace blink