Replace more ObserverList with base::ObserverList.

components/invalidation/invalidation_logger.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_INVALIDATION_INVALIDATION_LOGGER_H_
 #define COMPONENTS_INVALIDATION_INVALIDATION_LOGGER_H_
 
 #include <map>
 #include <set>
 
@@ skipping 58 matching lines @@
 
   // Send to every Observer many OnUpdateIds events, each with one registrar
   // and every objectId it currently has registered.
   void EmitUpdatedIds();
 
   // Send to every Observer a vector with the all the current registered
   // handlers.
   void EmitRegisteredHandlers();
 
   // The list of every observer currently listening for notifications.
-  ObserverList<InvalidationLoggerObserver> observer_list_;
+  base::ObserverList<InvalidationLoggerObserver> observer_list_;
 
   // The last InvalidatorState updated by the InvalidatorService.
   syncer::InvalidatorState last_invalidator_state_;
   base::Time last_invalidator_state_timestamp_;
 
   // The map that contains every object id that is currently registered
   // and its owner.
   std::map<std::string, syncer::ObjectIdSet> latest_ids_;
 
   // The map that counts how many invalidations per objectId there has been.
   syncer::ObjectIdCountMap invalidation_count_;
 
   // The name of all invalidatorHandler registered (note that this is not
   // necessarily the same as the keys of latest_ids_, because they might
   // have not registered any object id).
   std::multiset<std::string> registered_handlers_;
 
   DISALLOW_COPY_AND_ASSIGN(InvalidationLogger);
 };
 
 }  // namespace invalidation
 
 #endif  // COMPONENTS_INVALIDATION_INVALIDATION_LOGGER_H_