Replace more ObserverList with base::ObserverList.

components/policy/core/common/cloud/cloud_policy_service.h

 // Copyright (c) 2012 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_POLICY_CORE_COMMON_CLOUD_CLOUD_POLICY_SERVICE_H_
 #define COMPONENTS_POLICY_CORE_COMMON_CLOUD_CLOUD_POLICY_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 109 matching lines @@
   std::vector<RefreshPolicyCallback> refresh_callbacks_;
 
   UnregisterCallback unregister_callback_;
 
   // Set to true once the service is initialized (initial policy load/refresh
   // is complete).
   bool initialization_complete_;
 
   // Observers who will receive notifications when the service has finished
   // initializing.
-  ObserverList<Observer, true> observers_;
+  base::ObserverList<Observer, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(CloudPolicyService);
 };
 
 }  // namespace policy
 
 #endif  // COMPONENTS_POLICY_CORE_COMMON_CLOUD_CLOUD_POLICY_SERVICE_H_