Simpler return value of HashTable::add/HashMap:add and others

Source/core/fetch/ResourceLoadPriorityOptimizer.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 95 matching lines @@
     m_imageResources.clear();
 }
 
 void ResourceLoadPriorityOptimizer::notifyImageResourceVisibility(ImageResource* img, VisibilityStatus status)
 {
     if (!img || img->isLoaded())
         return;
 
     ImageResourceMap::AddResult result = m_imageResources.add(img->identifier(), adoptPtr(new ResourceAndVisibility(img, status)));
     if (!result.isNewEntry && status == Visible)
-        result.iterator->value->status = status;
+        result.storedValue->value->status = status;
 }
 
 }