Replace more ObserverList with base::ObserverList.

components/gcm_driver/gcm_driver_desktop.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_GCM_DRIVER_GCM_DRIVER_DESKTOP_H_
 #define COMPONENTS_GCM_DRIVER_GCM_DRIVER_DESKTOP_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 176 matching lines @@
 
   // Flag to indicate if GCM is enabled.
   bool gcm_enabled_;
 
   // Flag to indicate the last known state of the GCM client. Because this
   // flag lives on the UI thread, while the GCM client lives on the IO thread,
   // it may be out of date while connection changes are happening.
   bool connected_;
 
   // List of observers to notify when connection state changes.
-  ObserverList<GCMConnectionObserver, false> connection_observer_list_;
+  base::ObserverList<GCMConnectionObserver, false> connection_observer_list_;
 
   // Account mapper. Only works when user is signed in.
   scoped_ptr<GCMAccountMapper> account_mapper_;
 
   // Time of last token fetching.
   base::Time last_token_fetch_time_;
 
   scoped_refptr<base::SequencedTaskRunner> ui_thread_;
   scoped_refptr<base::SequencedTaskRunner> io_thread_;
 
@@ skipping 22 matching lines @@
 
   // Used to pass a weak pointer to the IO worker.
   base::WeakPtrFactory<GCMDriverDesktop> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMDriverDesktop);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_DRIVER_DESKTOP_H_