Disambiguate LifecycleObserver::contextDestroyed

third_party/WebKit/Source/modules/mediastream/UserMediaRequest.cpp

 /*
  * Copyright (C) 2011 Ericsson AB. All rights reserved.
  * Copyright (C) 2012 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:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 205 matching lines @@
 void UserMediaRequest::failUASpecific(const String& name,
                                       const String& message,
                                       const String& constraintName) {
   DCHECK(!name.isEmpty());
   if (!getExecutionContext())
     return;
   m_errorCallback->handleEvent(
       NavigatorUserMediaError::create(name, message, constraintName));
 }
 
-void UserMediaRequest::contextDestroyed() {
+void UserMediaRequest::contextDestroyed(ExecutionContext*) {
   if (m_controller) {
     m_controller->cancelUserMediaRequest(this);
     m_controller = nullptr;
   }
-
-  ContextLifecycleObserver::contextDestroyed();
 }
 
 DEFINE_TRACE(UserMediaRequest) {
   visitor->trace(m_controller);
   visitor->trace(m_successCallback);
   visitor->trace(m_errorCallback);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink