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

Source/core/css/StyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 3684 matching lines @@
     if (!state.style()->hasFilter() || state.pendingSVGDocuments().isEmpty())
         return;
 
     CachedResourceLoader* cachedResourceLoader = state.document()->cachedResourceLoader();
     Vector<RefPtr<FilterOperation> >& filterOperations = state.style()->mutableFilter().operations();
     for (unsigned i = 0; i < filterOperations.size(); ++i) {
         RefPtr<FilterOperation> filterOperation = filterOperations.at(i);
         if (filterOperation->getOperationType() == FilterOperation::REFERENCE) {
             ReferenceFilterOperation* referenceFilter = static_cast<ReferenceFilterOperation*>(filterOperation.get());
 
-            WebKitCSSSVGDocumentValue* value = state.pendingSVGDocuments().get(referenceFilter).get();
+            WebKitCSSSVGDocumentValue* value = state.pendingSVGDocuments().get(referenceFilter);
             if (!value)
                 continue;
             CachedSVGDocument* cachedDocument = value->load(cachedResourceLoader);
             if (!cachedDocument)
                 continue;
 
             // Stash the CachedSVGDocument on the reference filter.
             referenceFilter->setCachedSVGDocumentReference(adoptPtr(new CachedSVGDocumentReference(cachedDocument)));
         }
     }
@@ skipping 644 matching lines @@
     info.addMember(m_state, "state");
 
     // FIXME: move this to a place where it would be called only once?
     info.addMember(CSSDefaultStyleSheets::defaultStyle, "defaultStyle");
     info.addMember(CSSDefaultStyleSheets::defaultQuirksStyle, "defaultQuirksStyle");
     info.addMember(CSSDefaultStyleSheets::defaultPrintStyle,"defaultPrintStyle");
     info.addMember(CSSDefaultStyleSheets::defaultViewSourceStyle, "defaultViewSourceStyle");
 }
 
 } // namespace WebCore