Disambiguate LifecycleObserver::contextDestroyed

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

 /*
  * 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 71 matching lines @@
   if (!m_prerender)
     return;
   m_prerender->cancel();
   detach();
 }
 
 const KURL& PrerenderHandle::url() const {
   return m_prerender->url();
 }
 
-void PrerenderHandle::contextDestroyed() {
+void PrerenderHandle::contextDestroyed(ExecutionContext*) {
   // A PrerenderHandle is not removed from LifecycleNotifier::m_observers until
   // the next GC runs. Thus contextDestroyed() can be called for a
   // PrerenderHandle that is already cancelled (and thus detached). In that
   // case, we should not detach the PrerenderHandle again.
   if (!m_prerender)
     return;
   m_prerender->abandon();
   detach();
 }
 
 void PrerenderHandle::detach() {
   m_prerender->dispose();
   m_prerender.clear();
 }
 
 DEFINE_TRACE(PrerenderHandle) {
   visitor->trace(m_prerender);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink