Oilpan: fix build after r192098.

Source/core/inspector/InspectorOverlayImpl.h

 /*
  * Copyright (C) 2011 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
@@ skipping 37 matching lines @@
 class EmptyChromeClient;
 class GraphicsContext;
 class JSONValue;
 class Node;
 class Page;
 class PlatformGestureEvent;
 class PlatformKeyboardEvent;
 class PlatformMouseEvent;
 class PlatformTouchEvent;
 
-class InspectorOverlayImpl final : public InspectorOverlay, public InspectorOverlayHost::Listener {
+class InspectorOverlayImpl final : public NoBaseWillBeGarbageCollectedFinalized<InspectorOverlayImpl>, public InspectorOverlay, public InspectorOverlayHost::Listener {
     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(InspectorOverlayImpl);
 public:
     class Client {
     public:
         virtual ~Client() { }
 
         virtual void highlight() = 0;
         virtual void hideHighlight() = 0;
     };
 
     static PassOwnPtrWillBeRawPtr<InspectorOverlayImpl> create(Page* page, Client* client)
@@ skipping 64 matching lines @@
     Timer<InspectorOverlayImpl> m_timer;
     int m_suspendCount;
     bool m_updating;
     RawPtrWillBeMember<InspectorOverlay::Listener> m_listener;
 };
 
 } // namespace blink
 
 
 #endif // InspectorOverlayImpl_h