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

Source/core/loader/archive/ArchiveResourceCollection.cpp

 /*
  * Copyright (C) 2008 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
@@ skipping 56 matching lines @@
     ASSERT(resource);
     if (!resource)
         return;
 
     const KURL& url = resource->url(); // get before passing PassRefPtr (which sets it to 0)
     m_subresources.set(url, resource);
 }
 
 ArchiveResource* ArchiveResourceCollection::archiveResourceForURL(const KURL& url)
 {
-    ArchiveResource* resource = m_subresources.get(url).get();
+    ArchiveResource* resource = m_subresources.get(url);
     if (!resource)
         return 0;
         
     return resource;
 }
 
 PassRefPtr<MHTMLArchive> ArchiveResourceCollection::popSubframeArchive(const String& frameName, const KURL& url)
 {
     RefPtr<MHTMLArchive> archive = m_subframes.take(frameName);
     if (archive)
         return archive.release();
 
     return m_subframes.take(url.string());
 }
 
 }