Replace more ObserverList with base::ObserverList.

remoting/signaling/fake_signal_strategy.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_SIGNALING_FAKE_SIGNAL_STRATEGY_H_
 #define REMOTING_SIGNALING_FAKE_SIGNAL_STRATEGY_H_
 
 #include <list>
 #include <queue>
 #include <string>
@@ skipping 54 matching lines @@
       scoped_ptr<buzz::XmlElement> stanza);
 
   // Called by the |peer_|. Takes ownership of |stanza|.
   void OnIncomingMessage(scoped_ptr<buzz::XmlElement> stanza);
   void SetPeerCallback(const PeerCallback& peer_callback);
 
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_;
 
   std::string jid_;
   PeerCallback peer_callback_;
-  ObserverList<Listener, true> listeners_;
+  base::ObserverList<Listener, true> listeners_;
 
   int last_id_;
 
   base::TimeDelta send_delay_;
 
   // All received messages, includes thouse still in |pending_messages_|.
   std::list<buzz::XmlElement*> received_messages_;
 
   base::WeakPtrFactory<FakeSignalStrategy> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeSignalStrategy);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_SIGNALING_FAKE_SIGNAL_STRATEGY_H_