[Not committed] Make image load completion async and remove EventSender from ImageLoader

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 55 matching lines @@
         toHTMLInputElement(element)->ensureFallbackContent();
 }
 
 void HTMLImageLoader::noImageResourceToLoad()
 {
     // FIXME: Use fallback content even when there is no alt-text. The only blocker is the large amount of rebaselining it requires.
     if (!toHTMLElement(element())->altText().isEmpty())
         loadFallbackContentForElement(element());
 }
 
-void HTMLImageLoader::imageNotifyFinished(ImageResource*)
+void HTMLImageLoader::finishInternal(ImageResource* imageResource)
 {
-    ImageResource* cachedImage = image();
     RawPtr<Element> element = this->element();
-    ImageLoader::imageNotifyFinished(cachedImage);
 
-    bool loadError = cachedImage->errorOccurred();
+    bool loadError = imageResource->errorOccurred();
     if (isHTMLImageElement(*element)) {
         if (loadError)
             ensureFallbackContent();
         else
             toHTMLImageElement(element)->ensurePrimaryContent();
     }
 
     if (isHTMLInputElement(*element)) {
         if (loadError)
             ensureFallbackContent();
         else
             toHTMLInputElement(element)->ensurePrimaryContent();
     }
 
-    if ((loadError || cachedImage->response().httpStatusCode() >= 400) && isHTMLObjectElement(*element))
+    if ((loadError || imageResource->response().httpStatusCode() >= 400) && isHTMLObjectElement(*element))
         toHTMLObjectElement(element)->renderFallbackContent();
 }
 
 void HTMLImageLoader::ensureFallbackContent()
 {
     loadFallbackContentForElement(element());
 }
 
 } // namespace blink