Oilpan: move node/element rare data objects to the heap.

Source/core/dom/shadow/ElementShadow.cpp

 /*
  * Copyright (C) 2012 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 104 matching lines @@
 inline void DistributionPool::detachNonDistributedNodes()
 {
     for (size_t i = 0; i < m_nodes.size(); ++i) {
         if (m_distributed[i])
             continue;
         if (m_nodes[i]->renderer())
             m_nodes[i]->lazyReattachIfAttached();
     }
 }
 
-PassOwnPtr<ElementShadow> ElementShadow::create()
+PassOwnPtrWillBeRawPtr<ElementShadow> ElementShadow::create()
 {
-    return adoptPtr(new ElementShadow());
+    return adoptPtrWillBeNoop(new ElementShadow());
 }
 
 ElementShadow::ElementShadow()
     : m_needsDistributionRecalc(false)
     , m_needsSelectFeatureSet(false)
 {
 }
 
 ElementShadow::~ElementShadow()
 {
@@ skipping 33 matching lines @@
 
     while (RefPtr<ShadowRoot> oldRoot = m_shadowRoots.head()) {
         InspectorInstrumentation::willPopShadowRoot(shadowHost, oldRoot.get());
         shadowHost->document().removeFocusedElementOfSubtree(oldRoot.get());
         m_shadowRoots.removeHead();
         oldRoot->setParentOrShadowHostNode(0);
         oldRoot->setParentTreeScope(shadowHost->document());
         oldRoot->setPrev(0);
         oldRoot->setNext(0);
     }
-
 }
 
 void ElementShadow::attach(const Node::AttachContext& context)
 {
     Node::AttachContext childrenContext(context);
     childrenContext.resolvedStyle = 0;
 
     for (ShadowRoot* root = youngestShadowRoot(); root; root = root->olderShadowRoot()) {
         if (root->needsAttach())
             root->attach(childrenContext);
@@ skipping 162 matching lines @@
 
 void ElementShadow::trace(Visitor* visitor)
 {
     // Shadow roots are linked with previous and next pointers which are traced.
     // It is therefore enough to trace one of the shadow roots here and the
     // rest will be traced from there.
     visitor->trace(m_shadowRoots.head());
 }
 
 } // namespace