Cancel load event on a failed image resource fetch.

Source/core/loader/ImageLoader.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 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 273 matching lines @@
         return;
     }
 
     if (resource->wasCanceled()) {
         m_hasPendingLoadEvent = false;
         // Only consider updating the protection ref-count of the Element immediately before returning
         // from this function as doing so might result in the destruction of this ImageLoader.
         updatedHasPendingEvent();
         return;
     }
+    if (resource->errorOccurred()) {
+        loadEventSender().cancelEvent(this);
+        m_hasPendingLoadEvent = false;
 
+        m_hasPendingErrorEvent = true;
+        errorEventSender().dispatchEventSoon(this);
+
+        // Only consider updating the protection ref-count of the Element immediately before returning
+        // from this function as doing so might result in the destruction of this ImageLoader.
+        updatedHasPendingEvent();
+        return;
+    }
     loadEventSender().dispatchEventSoon(this);
 }
 
 RenderImageResource* ImageLoader::renderImageResource()
 {
     RenderObject* renderer = m_element->renderer();
 
     if (!renderer)
         return 0;
 
@@ skipping 170 matching lines @@
         handle->notifyImageSourceChanged();
     }
 }
 
 inline void ImageLoader::clearFailedLoadURL()
 {
     m_failedLoadURL = AtomicString();
 }
 
 }