Replace more ObserverList with base::ObserverList.

components/proximity_auth/connection.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_CONNECTION_H
 #define COMPONENTS_PROXIMITY_AUTH_CONNECTION_H
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 81 matching lines @@
   const std::string& received_bytes() { return received_bytes_; }
 
  private:
   // The remote device corresponding to this connection.
   const RemoteDevice remote_device_;
 
   // The current status of the connection.
   Status status_;
 
   // The registered observers of the connection.
-  ObserverList<ConnectionObserver> observers_;
+  base::ObserverList<ConnectionObserver> observers_;
 
   // A temporary buffer storing bytes received before a received message can be
   // fully constructed.
   std::string received_bytes_;
 
   // Whether a message is currently in the process of being sent.
   bool is_sending_message_;
 
   DISALLOW_COPY_AND_ASSIGN(Connection);
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_CONNECTION_H