Oilpan: Move CSSStyleDeclaration and subclasses to the heap using transistion types.

Source/core/frame/DOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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 1273 matching lines @@
     return m_document.get();
 }
 
 StyleMedia& DOMWindow::styleMedia() const
 {
     if (!m_media)
         m_media = StyleMedia::create(m_frame);
     return *m_media;
 }
 
-PassRefPtr<CSSStyleDeclaration> DOMWindow::getComputedStyle(Element* elt, const String& pseudoElt) const
+PassRefPtrWillBeRawPtr<CSSStyleDeclaration> DOMWindow::getComputedStyle(Element* elt, const String& pseudoElt) const
 {
     if (!elt)
         return nullptr;
 
     return CSSComputedStyleDeclaration::create(elt, false, pseudoElt);
 }
 
 PassRefPtrWillBeRawPtr<CSSRuleList> DOMWindow::getMatchedCSSRules(Element* element, const String& pseudoElement) const
 {
     UseCounter::count(document(), UseCounter::GetMatchedCSSRules);
@@ skipping 556 matching lines @@
     return static_cast<DOMWindowLifecycleNotifier&>(LifecycleContext<DOMWindow>::lifecycleNotifier());
 }
 
 PassOwnPtr<LifecycleNotifier<DOMWindow> > DOMWindow::createLifecycleNotifier()
 {
     return DOMWindowLifecycleNotifier::create(this);
 }
 
 
 } // namespace WebCore