Replace more ObserverList with base::ObserverList.

chromeos/dbus/fake_bluetooth_gatt_characteristic_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 CHROMEOS_DBUS_FAKE_BLUETOOTH_GATT_CHARACTERISTIC_CLIENT_H_
 #define CHROMEOS_DBUS_FAKE_BLUETOOTH_GATT_CHARACTERISTIC_CLIENT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 160 matching lines @@
     ~DelayedCallback();
 
     base::Closure callback_;
     size_t delay_;
   };
 
   // Map of delayed callbacks.
   std::map<std::string, DelayedCallback*> action_extra_requests_;
 
   // List of observers interested in event notifications from us.
-  ObserverList<Observer> observers_;
+  base::ObserverList<Observer> observers_;
 
   // Weak pointer factory for generating 'this' pointers that might live longer
   // than we do.
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<FakeBluetoothGattCharacteristicClient>
       weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeBluetoothGattCharacteristicClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_FAKE_BLUETOOTH_GATT_CHARACTERISTIC_CLIENT_H_