Oilpan: fix build after r364654.

third_party/WebKit/Source/core/dom/shadow/ElementShadow.h

 /*
  * 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 @@
 #endif
     NodeToDestinationInsertionPoints m_nodeToInsertionPoints;
 
     SelectRuleFeatureSet m_selectFeatures;
     // FIXME: Oilpan: add a heap-based version of DoublyLinkedList<>.
     DoublyLinkedList<ShadowRoot> m_shadowRoots;
     bool m_needsDistributionRecalc;
     bool m_needsSelectFeatureSet;
 
     // TODO(hayato): ShadowRoot should be an owner of SlotAssigment
-    OwnPtr<SlotAssignment> m_slotAssignment;
+    OwnPtrWillBeMember<SlotAssignment> m_slotAssignment;
 };
 
 inline Element* ElementShadow::host() const
 {
     ASSERT(!m_shadowRoots.isEmpty());
     return youngestShadowRoot().host();
 }
 
 inline ShadowRoot* Node::youngestShadowRoot() const
 {
@@ skipping 26 matching lines @@
 inline void ElementShadow::distributeIfNeeded()
 {
     if (m_needsDistributionRecalc)
         distribute();
     m_needsDistributionRecalc = false;
 }
 
 } // namespace
 
 #endif