[Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/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 42 matching lines @@
 
     TreeScope& treeScope() const { return *m_treeScope; }
     Node& rootNode() const { return *m_rootNode; }
 
     EventTarget* target() const { return m_target.get(); }
     void setTarget(PassRefPtrWillBeRawPtr<EventTarget>);
 
     EventTarget* relatedTarget() const { return m_relatedTarget.get(); }
     void setRelatedTarget(PassRefPtrWillBeRawPtr<EventTarget>);
 
-    TouchEventContext* touchEventContext() const { return m_touchEventContext.get(); }
+    TouchEventContext* touchEventContext() const;
     TouchEventContext* ensureTouchEventContext();
 
     WillBeHeapVector<RefPtrWillBeMember<EventTarget>>& ensureEventPath(EventPath&);
 
     bool isInclusiveAncestorOf(const TreeScopeEventContext&) const;
     bool isDescendantOf(const TreeScopeEventContext&) const;
 #if ENABLE(ASSERT)
     bool isExclusivePartOf(const TreeScopeEventContext&) const;
 #endif
     void addChild(TreeScopeEventContext& child) { m_children.append(&child); }
@@ skipping 65 matching lines @@
 {
     ASSERT(m_preOrder != -1 && m_postOrder != -1 && other.m_preOrder != -1 && other.m_postOrder != -1);
     return (m_preOrder < other.m_preOrder && m_postOrder < other.m_preOrder)
         || (m_preOrder > other.m_preOrder && m_preOrder > other.m_postOrder);
 }
 #endif
 
 }
 
 #endif // TreeScopeEventContext_h