Oilpan: move LiveNodeList collections to the heap.

Source/core/events/TreeScopeEventContext.h

 /*
  * Copyright (C) 2014 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:
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 41 matching lines @@
 
     EventTarget* target() const { return m_target.get(); }
     void setTarget(PassRefPtr<EventTarget>);
 
     EventTarget* relatedTarget() const { return m_relatedTarget.get(); }
     void setRelatedTarget(PassRefPtr<EventTarget>);
 
     TouchEventContext* touchEventContext() const { return m_touchEventContext.get(); }
     TouchEventContext* ensureTouchEventContext();
 
-    PassRefPtr<NodeList> ensureEventPath(EventPath&);
+    PassRefPtrWillBeRawPtr<NodeList> ensureEventPath(EventPath&);
 
     bool isInclusiveAncestorOf(const TreeScopeEventContext&);
     void addChild(TreeScopeEventContext& child) { m_children.append(&child); }
 
     // For ancestor-descendant relationship check in Q(1).
     // Preprocessing takes O(N).
     int calculatePrePostOrderNumber(int orderNumber);
 
 private:
     TreeScopeEventContext(TreeScope&);
 
 #ifndef NDEBUG
     bool isUnreachableNode(EventTarget&);
 #endif
 
     TreeScope& m_treeScope;
     RefPtr<EventTarget> m_target;
     RefPtr<EventTarget> m_relatedTarget;
-    RefPtr<NodeList> m_eventPath;
+    RefPtrWillBePersistent<NodeList> m_eventPath;
     RefPtrWillBePersistent<TouchEventContext> m_touchEventContext;
 
     Vector<TreeScopeEventContext*> m_children;
     int m_preOrder;
     int m_postOrder;
 };
 
 #ifndef NDEBUG
 inline bool TreeScopeEventContext::isUnreachableNode(EventTarget& target)
 {
@@ skipping 18 matching lines @@
 
 inline bool TreeScopeEventContext::isInclusiveAncestorOf(const TreeScopeEventContext& other)
 {
     ASSERT(m_preOrder != -1 && m_postOrder != -1 && other.m_preOrder != -1 && other.m_postOrder != -1);
     return m_preOrder <= other.m_preOrder && other.m_postOrder <= m_postOrder;
 }
 
 }
 
 #endif // TreeScopeEventContext_h