HashTraits<RefPtr<P> >::PeekType should be raw pointer for better performance

Source/core/accessibility/AXObjectCache.h

 /*
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010, 2011 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 132 matching lines @@
 #endif
 
     void removeAXID(AccessibilityObject*);
     bool isIDinUse(AXID id) const { return m_idsInUse.contains(id); }
 
     Element* rootAXEditableElement(Node*);
     const Element* rootAXEditableElement(const Node*);
     bool nodeIsTextControl(const Node*);
 
     AXID platformGenerateAXID() const;
-    AccessibilityObject* objectFromAXID(AXID id) const { return m_objects.get(id).get(); }
+    AccessibilityObject* objectFromAXID(AXID id) const { return m_objects.get(id); }
 
     // Text marker utilities.
     void textMarkerDataForVisiblePosition(TextMarkerData&, const VisiblePosition&);
     VisiblePosition visiblePositionForTextMarkerData(TextMarkerData&);
 
     enum AXNotification {
         AXActiveDescendantChanged,
         AXAutocorrectionOccured,
         AXCheckedStateChanged,
         AXChildrenChanged,
@@ skipping 131 matching lines @@
 inline void AXObjectCache::remove(RenderObject*) { }
 inline void AXObjectCache::remove(Node*) { }
 inline void AXObjectCache::remove(Widget*) { }
 inline void AXObjectCache::selectedChildrenChanged(RenderObject*) { }
 inline void AXObjectCache::selectedChildrenChanged(Node*) { }
 #endif
 
 }
 
 #endif