NotificationController handles an ownership of NotificaitonClient

Source/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 2009 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 1293 matching lines @@
 }
 
 WebPlugin* WebLocalFrameImpl::focusedPluginIfInputMethodSupported()
 {
     WebPluginContainerImpl* container = WebLocalFrameImpl::pluginContainerFromNode(frame(), WebNode(frame()->document()->focusedElement()));
     if (container && container->supportsInputMethod())
         return container->plugin();
     return 0;
 }
 
-NotificationPresenterImpl* WebLocalFrameImpl::notificationPresenterImpl()
-{
-    if (!m_notificationPresenter.isInitialized() && m_client)
-        m_notificationPresenter.initialize(m_client->notificationPresenter());
-    return &m_notificationPresenter;
-}
-
 int WebLocalFrameImpl::printBegin(const WebPrintParams& printParams, const WebNode& constrainToNode)
 {
     ASSERT(!frame()->document()->isFrameSet());
     WebPluginContainerImpl* pluginContainer = 0;
     if (constrainToNode.isNull()) {
         // If this is a plugin document, check if the plugin supports its own
         // printing. If it does, we will delegate all printing to that.
         pluginContainer = pluginContainerFromFrame(frame());
     } else {
         // We only support printing plugin nodes for now.
@@ skipping 262 matching lines @@
 
     cancelPendingScopingEffort();
 }
 
 void WebLocalFrameImpl::setWebCoreFrame(PassRefPtr<WebCore::LocalFrame> frame)
 {
     m_frame = frame;
 
     // FIXME: we shouldn't add overhead to every frame by registering these objects when they're not used.
     if (m_frame) {
-        provideNotification(*m_frame, notificationPresenterImpl());
+        OwnPtr<NotificationPresenterImpl> notificationPresenter = adoptPtr(new NotificationPresenterImpl());
+        if (m_client)
+            notificationPresenter->initialize(m_client->notificationPresenter());
+
+        provideNotification(*m_frame, notificationPresenter.release());
         provideUserMediaTo(*m_frame, &m_userMediaClientImpl);
     }
 }
 
 void WebLocalFrameImpl::initializeAsMainFrame(WebCore::Page* page)
 {
     setWebCoreFrame(LocalFrame::create(&m_frameLoaderClientImpl, &page->frameHost(), 0));
 
     // We must call init() after m_frame is assigned because it is referenced
     // during init().
@@ skipping 290 matching lines @@
 
 void WebLocalFrameImpl::invalidateAll() const
 {
     ASSERT(frame() && frame()->view());
     FrameView* view = frame()->view();
     view->invalidateRect(view->frameRect());
     invalidateScrollbar();
 }
 
 } // namespace blink