Oilpan: remove RawPtr<> usage for WebNotification.

Source/web/NotificationPresenterImpl.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 61 matching lines @@
     m_presenter = presenter;
 }
 
 bool NotificationPresenterImpl::isInitialized()
 {
     return !!m_presenter;
 }
 
 bool NotificationPresenterImpl::show(Notification* notification)
 {
-    return m_presenter->show(RawPtr<Notification>(notification));
+    return m_presenter->show(notification);
 }
 
 void NotificationPresenterImpl::close(Notification* notification)
 {
-    m_presenter->close(RawPtr<Notification>(notification));
+    m_presenter->close(notification);
 
     // FIXME: Remove the duplicated call to cancel() when Chromium updated to override close() instead.
-    m_presenter->cancel(RawPtr<Notification>(notification));
+    m_presenter->cancel(notification);
 }
 
 void NotificationPresenterImpl::notificationObjectDestroyed(Notification* notification)
 {
-    m_presenter->objectDestroyed(RawPtr<Notification>(notification));
+    m_presenter->objectDestroyed(notification);
 }
 
 NotificationClient::Permission NotificationPresenterImpl::checkPermission(ExecutionContext* context)
 {
     int result = m_presenter->checkPermission(WebSecurityOrigin(context->securityOrigin()));
     return static_cast<NotificationClient::Permission>(result);
 }
 
 void NotificationPresenterImpl::requestPermission(ExecutionContext* context, WTF::PassOwnPtr<NotificationPermissionCallback> callback)
 {
     m_presenter->requestPermission(WebSecurityOrigin(context->securityOrigin()), new NotificationPermissionCallbackClient(m_presenter, context->securityOrigin(), callback));
 }
 
 } // namespace blink