| Index: third_party/WebKit/Source/core/workers/WorkerThreadLifecycleObserver.h | 
| diff --git a/third_party/WebKit/Source/core/workers/WorkerThreadLifecycleObserver.h b/third_party/WebKit/Source/core/workers/WorkerThreadLifecycleObserver.h | 
| index 2e0e7101cd27cee5f41e58bcf039826c1071033e..a01c39d5e6c2245c6fc67c12af8b6372b6b3e530 100644 | 
| --- a/third_party/WebKit/Source/core/workers/WorkerThreadLifecycleObserver.h | 
| +++ b/third_party/WebKit/Source/core/workers/WorkerThreadLifecycleObserver.h | 
| @@ -29,6 +29,9 @@ class WorkerThreadLifecycleContext; | 
| class CORE_EXPORT WorkerThreadLifecycleObserver | 
| : public LifecycleObserver<WorkerThreadLifecycleContext, | 
| WorkerThreadLifecycleObserver> { | 
| + public: | 
| +  virtual void contextDestroyed(WorkerThreadLifecycleContext*) {} | 
| + | 
| protected: | 
| explicit WorkerThreadLifecycleObserver(WorkerThreadLifecycleContext*); | 
| virtual ~WorkerThreadLifecycleObserver(); | 
|  |