Replace more ObserverList with base::ObserverList.

components/pairing/fake_host_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_HOST_PAIRING_CONTROLLER_H_
 #define COMPONENTS_PAIRING_FAKE_HOST_PAIRING_CONTROLLER_H_
 
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
@@ skipping 34 matching lines @@
   std::string GetDeviceName() override;
   std::string GetConfirmationCode() override;
   std::string GetEnrollmentDomain() override;
   void OnUpdateStatusChanged(UpdateStatus update_status) override;
   void OnEnrollmentStatusChanged(EnrollmentStatus enrollment_status) override;
   void SetPermanentId(const std::string& permanent_id) override;
 
   // HostPairingController::Observer:
   void PairingStageChanged(Stage new_stage) override;
 
-  ObserverList<Observer> observers_;
+  base::ObserverList<Observer> observers_;
   Stage current_stage_;
   std::string device_name_;
   std::string confirmation_code_;
   base::TimeDelta async_duration_;
 
   // If this flag is true error happens on |STAGE_ENROLLING| once.
   bool enrollment_should_fail_;
 
   // Controller starts its work like if update and reboot already happened.
   bool start_after_update_;
 
   std::string enrollment_domain_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeHostPairingController);
 };
 
 }  // namespace pairing_chromeos
 
 #endif  // COMPONENTS_PAIRING_FAKE_HOST_PAIRING_CONTROLLER_H_