Rename ContextDestructionObserver to ContextLifecycleObserver

Source/modules/encryptedmedia/MediaKeySession.cpp

 /*
  * Copyright (C) 2013 Apple 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 23 matching lines @@
 #include "modules/encryptedmedia/MediaKeys.h"
 
 namespace WebCore {
 
 PassRefPtr<MediaKeySession> MediaKeySession::create(ScriptExecutionContext* context, ContentDecryptionModule* cdm, MediaKeys* keys)
 {
     return adoptRef(new MediaKeySession(context, cdm, keys));
 }
 
 MediaKeySession::MediaKeySession(ScriptExecutionContext* context, ContentDecryptionModule* cdm, MediaKeys* keys)
-    : ContextDestructionObserver(context)
+    : ContextLifecycleObserver(context)
     , m_asyncEventQueue(GenericEventQueue::create(this))
     , m_keySystem(keys->keySystem())
     , m_session(cdm->createSession(this))
     , m_keys(keys)
     , m_keyRequestTimer(this, &MediaKeySession::keyRequestTimerFired)
     , m_addKeyTimer(this, &MediaKeySession::addKeyTimerFired)
 {
     ScriptWrappable::init(this);
 }
 
@@ skipping 136 matching lines @@
     m_asyncEventQueue->enqueueEvent(event.release());
 }
 
 const AtomicString& MediaKeySession::interfaceName() const
 {
     return eventNames().interfaceForMediaKeySession;
 }
 
 ScriptExecutionContext* MediaKeySession::scriptExecutionContext() const
 {
-    return ContextDestructionObserver::scriptExecutionContext();
+    return ContextLifecycleObserver::scriptExecutionContext();
 }
 
 }