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

Source/core/html/shadow/ContentDistributor.cpp

 /*
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 171 matching lines @@
     , m_validity(Undetermined)
 {
 }
 
 ContentDistributor::~ContentDistributor()
 {
 }
 
 InsertionPoint* ContentDistributor::findInsertionPointFor(const Node* key) const
 {
-    return m_nodeToInsertionPoint.get(key).get();
+    return m_nodeToInsertionPoint.get(key);
 }
 
 void ContentDistributor::populate(Node* node, ContentDistribution& pool)
 {
     if (!isActiveInsertionPoint(node)) {
         pool.append(node);
         return;
     }
 
     InsertionPoint* insertionPoint = toInsertionPoint(node);
@@ skipping 227 matching lines @@
     invalidateDistribution(host);
 }
 
 void ContentDistributor::didShadowBoundaryChange(Element* host)
 {
     setValidity(Undetermined);
     invalidateDistribution(host);
 }
 
 }