Replace more ObserverList with base::ObserverList.

components/proximity_auth/client.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 COMPONENTS_PROXIMITY_AUTH_CLIENT_H
 #define COMPONENTS_PROXIMITY_AUTH_CLIENT_H
 
 #include <deque>
 
 #include "base/macros.h"
@@ skipping 90 matching lines @@
                        bool success) override;
 
   // The connection used to send and receive events and status updates.
   scoped_ptr<Connection> connection_;
 
   // Used to encrypt and decrypt payloads sent and received over the
   // |connection_|.
   scoped_ptr<SecureContext> secure_context_;
 
   // The registered observers of |this_| client.
-  ObserverList<ClientObserver> observers_;
+  base::ObserverList<ClientObserver> observers_;
 
   // Queue of messages to send to the remote device.
   std::deque<PendingMessage> queued_messages_;
 
   // The current message being sent or waiting on the remote device for a
   // response. Null if there is no message currently in this state.
   scoped_ptr<PendingMessage> pending_message_;
 
   DISALLOW_COPY_AND_ASSIGN(Client);
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_CLIENT_H