Rename ContextDestructionObserver to ContextLifecycleObserver

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 62 matching lines @@
     if (ec)
         return 0;
 
     if (!audio && !video)
         return 0;
 
     return adoptRef(new UserMediaRequest(context, controller, audio.release(), video.release(), successCallback, errorCallback));
 }
 
 UserMediaRequest::UserMediaRequest(ScriptExecutionContext* context, UserMediaController* controller, PassRefPtr<MediaConstraintsImpl> audio, PassRefPtr<MediaConstraintsImpl> video, PassRefPtr<NavigatorUserMediaSuccessCallback> successCallback, PassRefPtr<NavigatorUserMediaErrorCallback> errorCallback)
-    : ContextDestructionObserver(context)
+    : ContextLifecycleObserver(context)
     , m_audio(audio)
     , m_video(video)
     , m_controller(controller)
     , m_successCallback(successCallback)
     , m_errorCallback(errorCallback)
 {
 }
 
 UserMediaRequest::~UserMediaRequest()
 {
@@ skipping 84 matching lines @@
 
 void UserMediaRequest::contextDestroyed()
 {
     RefPtr<UserMediaRequest> protect(this);
 
     if (m_controller) {
         m_controller->cancelUserMediaRequest(this);
         m_controller = 0;
     }
 
-    ContextDestructionObserver::contextDestroyed();
+    ContextLifecycleObserver::contextDestroyed();
 }
 
 } // namespace WebCore