Use C++11 features in core/html

Source/core/html/HTMLFrameOwnerElement.cpp

 /*
  * Copyright (C) 2006, 2007, 2009 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 44 matching lines @@
 
 HTMLFrameOwnerElement::UpdateSuspendScope::UpdateSuspendScope()
 {
     ++s_updateSuspendCount;
 }
 
 void HTMLFrameOwnerElement::UpdateSuspendScope::performDeferredWidgetTreeOperations()
 {
     WidgetToParentMap map;
     widgetNewParentMap().swap(map);
-    WidgetToParentMap::iterator end = map.end();
-    for (WidgetToParentMap::iterator it = map.begin(); it != end; ++it) {
-        Widget* child = it->key.get();
+    for (const auto& widget : map) {
+        Widget* child = widget.key.get();
         FrameView* currentParent = toFrameView(child->parent());
-        FrameView* newParent = it->value;
+        FrameView* newParent = widget.value;
         if (newParent != currentParent) {
             if (currentParent)
                 currentParent->removeChild(child);
             if (newParent)
                 newParent->addChild(child);
 #if ENABLE(OILPAN)
             if (currentParent && !newParent)
                 child->dispose();
 #endif
         }
@@ skipping 187 matching lines @@
 void HTMLFrameOwnerElement::trace(Visitor* visitor)
 {
     visitor->trace(m_contentFrame);
     visitor->trace(m_widget);
     HTMLElement::trace(visitor);
     FrameOwner::trace(visitor);
 }
 
 
 } // namespace blink