Use C++11 range-based loop for core/xml and core/loader

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 557 matching lines @@
 {
     if (m_loadDelayCounter)
         m_loadDelayCounter->documentChanged(m_element->document());
     clearFailedLoadURL();
     setImage(0);
 }
 
 void ImageLoader::sourceImageChanged()
 {
 #if ENABLE(OILPAN)
-    PersistentHeapHashMap<WeakMember<ImageLoaderClient>, OwnPtr<ImageLoaderClientRemover> >::iterator end = m_clients.end();
-    for (PersistentHeapHashMap<WeakMember<ImageLoaderClient>, OwnPtr<ImageLoaderClientRemover> >::iterator it = m_clients.begin(); it != end; ++it) {
-        it->key->notifyImageSourceChanged();
-    }
+    for (auto& client : m_clients)
+        client.key->notifyImageSourceChanged();
 #else
-    HashSet<ImageLoaderClient*>::iterator end = m_clients.end();
-    for (HashSet<ImageLoaderClient*>::iterator it = m_clients.begin(); it != end; ++it) {
-        ImageLoaderClient* handle = *it;
+    for (auto& client : m_clients) {
+        ImageLoaderClient* handle = client;
         handle->notifyImageSourceChanged();
     }
 #endif
 }
 
 #if ENABLE(OILPAN)
 ImageLoader::ImageLoaderClientRemover::~ImageLoaderClientRemover()
 {
     m_loader.willRemoveClient(m_client);
 }
 #endif
 }