Replace more ObserverList with base::ObserverList.

extensions/browser/api/networking_private/networking_private_service_client.h

 // Copyright 2013 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 EXTENSIONS_BROWSER_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_SERVICE_CLIENT_H_
 #define EXTENSIONS_BROWSER_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_SERVICE_CLIENT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 138 matching lines @@
       const wifi::WiFiService::NetworkGuidList& network_guid_list);
 
   // Add new |ServiceCallbacks| to |callbacks_map_|.
   ServiceCallbacks* AddServiceCallbacks();
   // Removes ServiceCallbacks for |callback_id| from |callbacks_map_|.
   void RemoveServiceCallbacks(ServiceCallbacksID callback_id);
 
   // Callbacks to run when callback is called from WiFiService.
   ServiceCallbacksMap callbacks_map_;
   // Observers to Network Events.
-  ObserverList<NetworkingPrivateDelegateObserver> network_events_observers_;
+  base::ObserverList<NetworkingPrivateDelegateObserver>
+      network_events_observers_;
   // Interface to WiFiService. Used and deleted on the worker thread.
   scoped_ptr<wifi::WiFiService> wifi_service_;
   // Sequence token associated with wifi tasks.
   base::SequencedWorkerPool::SequenceToken sequence_token_;
   // Task runner for worker tasks.
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
   // Use WeakPtrs for callbacks from |wifi_service_|.
   base::WeakPtrFactory<NetworkingPrivateServiceClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkingPrivateServiceClient);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_SERVICE_CLIENT_H_