[ImageResource 4] Split ImageResource into Resource and Image parts

third_party/WebKit/Source/core/svg/graphics/SVGImage.cpp

 /*
  * Copyright (C) 2006 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. 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.
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   if (getImageObserver()->shouldPauseAnimation(this)) {
     stopAnimation();
     return;
   }
 
   // serviceScriptedAnimations runs requestAnimationFrame callbacks, but SVG
   // images can't have any so we assert there's no script.
   ScriptForbiddenScope forbidScript;
 
   // The calls below may trigger GCs, so set up the required persistent
-  // reference on the ImageResource which owns this SVGImage. By transitivity,
-  // that will keep the associated SVGImageChromeClient object alive.
+  // reference on the ImageResourceContent which owns this SVGImage. By
+  // transitivity, that will keep the associated SVGImageChromeClient object
+  // alive.
   Persistent<ImageObserver> protect(getImageObserver());
   m_page->animator().serviceScriptedAnimations(monotonicAnimationStartTime);
   // Do *not* update the paint phase. It's critical to paint only when
   // actually generating painted output, not only for performance reasons,
   // but to preserve correct coherence of the cache of the output with
   // the needsRepaint bits of the PaintLayers in the image.
   toLocalFrame(m_page->mainFrame())
       ->view()
       ->updateAllLifecyclePhasesExceptPaint();
 }
@@ skipping 120 matching lines @@
   }
 
   return m_page ? SizeAvailable : SizeUnavailable;
 }
 
 String SVGImage::filenameExtension() const {
   return "svg";
 }
 
 }  // namespace blink