Oilpan: Ensure that classes with virtual trace methods always have vtables for their left-most base…

Source/modules/geolocation/Geolocation.h

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All Rights Reserved.
  * Copyright 2010, The Android Open Source Project
  *
  * 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 38 matching lines @@
 class GeolocationPosition;
 class ExecutionContext;
 
 class Geolocation FINAL
     : public GarbageCollectedFinalized<Geolocation>
     , public ScriptWrappable
     , public ActiveDOMObject {
 public:
     static Geolocation* create(ExecutionContext*);
     virtual ~Geolocation();
-    void trace(Visitor*);
+    virtual void trace(Visitor*);
 
     virtual void stop() OVERRIDE;
     Document* document() const;
     LocalFrame* frame() const;
 
     // Creates a oneshot and attempts to obtain a position that meets the
     // constraints of the options.
     void getCurrentPosition(PassOwnPtr<PositionCallback>, PassOwnPtr<PositionErrorCallback>, const Dictionary&);
 
     // Creates a watcher that will be notified whenever a new position is
@@ skipping 109 matching lines @@
     };
 
     Permission m_geolocationPermission;
 
     GeoNotifierSet m_requestsAwaitingCachedPosition;
 };
 
 } // namespace blink
 
 #endif // Geolocation_h