Extract simpler classes for observing context lifecycle and observe Page lifecycle inNavigatorVibra…

Source/core/dom/ScriptExecutionContext.cpp

 /*
  * Copyright (C) 2008 Apple Inc. 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 167 matching lines @@
 }
 
 void ScriptExecutionContext::suspendActiveDOMObjectIfNeeded(ActiveDOMObject* object)
 {
     ASSERT(lifecycleNotifier()->contains(object));
     // Ensure all ActiveDOMObjects are suspended also newly created ones.
     if (m_activeDOMObjectsAreSuspended)
         object->suspend(m_reasonForSuspendingActiveDOMObjects);
 }
 
-void ScriptExecutionContext::wasObservedBy(ContextLifecycleObserver* observer, ContextLifecycleObserver::Type as)
-{
-    lifecycleNotifier()->addObserver(observer, as);
-}
-
-void ScriptExecutionContext::wasUnobservedBy(ContextLifecycleObserver* observer, ContextLifecycleObserver::Type as)
-{
-    lifecycleNotifier()->removeObserver(observer, as);
-}
-
 void ScriptExecutionContext::closeMessagePorts() {
     HashSet<MessagePort*>::iterator messagePortsEnd = m_messagePorts.end();
     for (HashSet<MessagePort*>::iterator iter = m_messagePorts.begin(); iter != messagePortsEnd; ++iter) {
         ASSERT((*iter)->scriptExecutionContext() == this);
         (*iter)->close();
     }
 }
 
 bool ScriptExecutionContext::sanitizeScriptError(String& errorMessage, int& lineNumber, String& sourceURL, CachedScript* cachedScript)
 {
@@ skipping 98 matching lines @@
         iter->value->didChangeAlignmentInterval();
 }
 
 double ScriptExecutionContext::timerAlignmentInterval() const
 {
     return DOMTimer::visiblePageAlignmentInterval();
 }
 
 ContextLifecycleNotifier* ScriptExecutionContext::lifecycleNotifier()
 {
-    if (!m_lifecycleNotifier)
-        m_lifecycleNotifier = const_cast<ScriptExecutionContext*>(this)->createLifecycleNotifier();
-    return m_lifecycleNotifier.get();
+    return static_cast<ContextLifecycleNotifier*>(LifecycleContext::lifecycleNotifier());
 }
 
-PassOwnPtr<ContextLifecycleNotifier> ScriptExecutionContext::createLifecycleNotifier()
+PassOwnPtr<LifecycleNotifier> ScriptExecutionContext::createLifecycleNotifier()
 {
     return ContextLifecycleNotifier::create(this);
 }
 
 ScriptExecutionContext::Task::~Task()
 {
 }
 
 void ScriptExecutionContext::setDatabaseContext(DatabaseContext* databaseContext)
 {
     m_databaseContext = databaseContext;
 }
 
 } // namespace WebCore