Replace more ObserverList with base::ObserverList.

components/pairing/fake_controller_pairing_controller.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_PAIRING_FAKE_CONTROLLER_PAIRING_CONTROLLER_H_
 #define COMPONENTS_PAIRING_FAKE_CONTROLLER_PAIRING_CONTROLLER_H_
 
 #include <set>
 #include <utility>
 
@@ skipping 75 matching lines @@
   void ChangeStage(Stage new_stage);
   void ChangeStageLater(Stage new_stage);
   void ExecuteDiscoveryEvent(size_t event_position);
   void DeviceFound(const std::string& device_id);
   void DeviceLost(const std::string& device_id);
 
   // Overridden from ui::ControllerPairingController::Observer:
   void PairingStageChanged(Stage new_stage) override;
   void DiscoveredDevicesListChanged() override;
 
-  ObserverList<ControllerPairingController::Observer> observers_;
+  base::ObserverList<ControllerPairingController::Observer> observers_;
   Stage current_stage_;
   std::string confirmation_code_;
   std::string preset_confirmation_code_;
   base::TimeDelta async_duration_;
   DiscoveryScenario discovery_scenario_;
   std::set<std::string> discovered_devices_;
   std::string choosen_device_;
   bool should_fail_on_connecting_;
   Stage connection_lost_begin_;
   Stage connection_lost_end_;
   bool enrollment_should_fail_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeControllerPairingController);
 };
 
 }  // namespace pairing_chromeos
 
 #endif  // COMPONENTS_PAIRING_FAKE_CONTROLLER_PAIRING_CONTROLLER_H_