| Index: Source/core/frame/FrameOwner.h
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| diff --git a/Source/core/frame/FrameOwner.h b/Source/core/frame/FrameOwner.h
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| index 1f19f7d515746772c07f8d1af80468ee1aaa019c..f87a53dc25d0b7f6aa6a6936f85dcc94c848e7bf 100644
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| --- a/Source/core/frame/FrameOwner.h
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| +++ b/Source/core/frame/FrameOwner.h
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| @@ -6,12 +6,14 @@
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|  #define FrameOwner_h
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|  
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|  #include "core/dom/SandboxFlags.h"
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| +#include "platform/heap/Handle.h"
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|  
 | 
|  namespace blink {
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|  
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| -class FrameOwner {
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| +class FrameOwner : public WillBeGarbageCollectedMixin {
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|  public:
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|      virtual ~FrameOwner() { }
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| +    virtual void trace(Visitor*) { }
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|  
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|      virtual bool isLocal() const = 0;
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|  
 | 
| 
 |