Disambiguate LifecycleObserver::contextDestroyed

third_party/WebKit/Source/core/loader/PrerenderHandle.h

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 42 matching lines @@
                                  PrerenderClient*,
                                  const KURL&,
                                  unsigned prerenderRelTypes);
 
   virtual ~PrerenderHandle();
 
   void cancel();
   const KURL& url() const;
 
   // ContextLifecycleObserver:
-  void contextDestroyed() override;
+  void contextDestroyed(ExecutionContext*) override;
 
   DECLARE_VIRTUAL_TRACE();
   EAGERLY_FINALIZE();
 
  private:
   PrerenderHandle(Document&, Prerender*);
 
   void detach();
 
   Member<Prerender> m_prerender;
 };
 
 }  // namespace blink
 
 #endif  // PrerenderHandle_h