Add decode() functionality to image elements.

third_party/WebKit/Source/core/html/HTMLImageLoader.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 57 matching lines @@
     toHTMLInputElement(GetElement())->EnsureFallbackContent();
 }
 
 void HTMLImageLoader::ImageNotifyFinished(ImageResourceContent*) {
   ImageResourceContent* cached_image = GetImage();
   Element* element = this->GetElement();
   ImageLoader::ImageNotifyFinished(cached_image);
 
   bool load_error = cached_image->ErrorOccurred();
   if (isHTMLImageElement(*element)) {
+    toHTMLImageElement(element)->ImageNotifyFinished(!load_error);
     if (load_error)
       toHTMLImageElement(element)->EnsureCollapsedOrFallbackContent();
     else
       toHTMLImageElement(element)->EnsurePrimaryContent();
   }
 
   if (isHTMLInputElement(*element)) {
     if (load_error)
       toHTMLInputElement(element)->EnsureFallbackContent();
     else
       toHTMLInputElement(element)->EnsurePrimaryContent();
   }
 
   if ((load_error || cached_image->GetResponse().HttpStatusCode() >= 400) &&
       isHTMLObjectElement(*element))
     toHTMLObjectElement(element)->RenderFallbackContent();
 }
 
 }  // namespace blink