(Concept patch) Simplify WTF::HashTable::add() return value for size and performance

Source/core/html/PublicURLManager.cpp

 /*
  * Copyright (C) 2012 Motorola Mobility Inc.
  * 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 33 matching lines @@
     : ActiveDOMObject(context)
     , m_isStopped(false)
 {
 }
 
 void PublicURLManager::registerURL(SecurityOrigin* origin, const KURL& url, URLRegistrable* registrable)
 {
     if (m_isStopped)
         return;
 
-    RegistryURLMap::iterator found = m_registryToURL.add(&registrable->registry(), URLSet()).iterator;
+    RegistryURLMap::ValueType* found = m_registryToURL.add(&registrable->registry(), URLSet()).iterator;
     found->key->registerURL(origin, url, registrable);
     found->value.add(url.string());
 }
 
 void PublicURLManager::revoke(const KURL& url)
 {
     for (RegistryURLMap::iterator i = m_registryToURL.begin(); i != m_registryToURL.end(); ++i) {
         if (i->value.contains(url.string())) {
             i->key->unregisterURL(url);
             i->value.remove(url.string());
@@ skipping 10 matching lines @@
     m_isStopped = true;
     for (RegistryURLMap::iterator i = m_registryToURL.begin(); i != m_registryToURL.end(); ++i) {
         for (URLSet::iterator j = i->value.begin(); j != i->value.end(); ++j)
             i->key->unregisterURL(KURL(ParsedURLString, *j));
     }
 
     m_registryToURL.clear();
 }
 
 }