Removed ref churn from Document::getNonAttachedStyle.

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
@@ skipping 1237 matching lines @@
 
 // We use HashMap::set over HashMap::add here as we want to
 // replace the ComputedStyle but not the Element if the Element is
 // already present.
 void Document::addNonAttachedStyle(Element& element,
                                    RefPtr<ComputedStyle> computedStyle) {
   m_nonAttachedStyle.set(&element, computedStyle);
 }
 
 ComputedStyle* Document::getNonAttachedStyle(Element& element) {
-  RefPtr<ComputedStyle> style = m_nonAttachedStyle.get(&element);
-  return style.get();
+  return m_nonAttachedStyle.get(&element);
 }
 
 /*
  * Performs three operations:
  *  1. Convert control characters to spaces
  *  2. Trim leading and trailing spaces
  *  3. Collapse internal whitespace.
  */
 template <typename CharacterType>
 static inline String canonicalizedTitle(Document* document,
@@ skipping 5132 matching lines @@
 }
 
 void showLiveDocumentInstances() {
   WeakDocumentSet& set = liveDocumentSet();
   fprintf(stderr, "There are %u documents currently alive:\n", set.size());
   for (Document* document : set)
     fprintf(stderr, "- Document %p URL: %s\n", document,
             document->url().getString().utf8().data());
 }
 #endif