Disambiguate LifecycleObserver::contextDestroyed

third_party/WebKit/Source/modules/mediasource/MediaSource.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 742 matching lines @@
 
   setReadyState(openKeyword());
   m_webMediaSource->unmarkEndOfStream();
 }
 
 bool MediaSource::hasPendingActivity() const {
   return m_attachedElement || m_webMediaSource ||
          m_asyncEventQueue->hasPendingEvents() || m_addedToRegistryCounter > 0;
 }
 
-void MediaSource::contextDestroyed() {
+void MediaSource::contextDestroyed(ExecutionContext*) {
   m_asyncEventQueue->close();
   if (!isClosed())
     setReadyState(closedKeyword());
   m_webMediaSource.reset();
 }
 
 std::unique_ptr<WebSourceBuffer> MediaSource::createWebSourceBuffer(
     const String& type,
     const String& codecs,
     ExceptionState& exceptionState) {
@@ skipping 37 matching lines @@
   event->setTarget(this);
 
   m_asyncEventQueue->enqueueEvent(event);
 }
 
 URLRegistry& MediaSource::registry() const {
   return MediaSourceRegistry::registry();
 }
 
 }  // namespace blink