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

Source/platform/network/ResourceResponse.cpp

 /*
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 293 matching lines @@
 
     m_httpHeaderFields.set(name, value);
 }
 
 void ResourceResponse::addHTTPHeaderField(const AtomicString& name, const AtomicString& value)
 {
     updateHeaderParsedState(name);
 
     HTTPHeaderMap::AddResult result = m_httpHeaderFields.add(name, value);
     if (!result.isNewEntry)
-        result.iterator->value = result.iterator->value + ", " + value;
+        result.storedValue->value = result.storedValue->value + ", " + value;
 }
 
 void ResourceResponse::clearHTTPHeaderField(const AtomicString& name)
 {
     m_httpHeaderFields.remove(name);
 }
 
 const HTTPHeaderMap& ResourceResponse::httpHeaderFields() const
 {
     return m_httpHeaderFields;
@@ skipping 349 matching lines @@
             pos += nextCommaPosition - pos + 1;
         } else {
             // Add last directive to map with empty string as value
             result.append(pair<String, String>(trimToNextSeparator(safeHeader.substring(pos, max - pos).stripWhiteSpace()), ""));
             return;
         }
     }
 }
 
 }