Replace more ObserverList with base::ObserverList.

components/sync_driver/sync_prefs.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_SYNC_DRIVER_SYNC_PREFS_H_
 #define COMPONENTS_SYNC_DRIVER_SYNC_PREFS_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 155 matching lines @@
   // Returns a ModelTypeSet based on |types| expanded to include pref groups
   // (see |pref_groups_|), but as a subset of |registered_types|.
   syncer::ModelTypeSet ResolvePrefGroups(syncer::ModelTypeSet registered_types,
                                          syncer::ModelTypeSet types) const;
 
   void OnSyncManagedPrefChanged();
 
   // May be NULL.
   PrefService* const pref_service_;
 
-  ObserverList<SyncPrefObserver> sync_pref_observers_;
+  base::ObserverList<SyncPrefObserver> sync_pref_observers_;
 
   // The preference that controls whether sync is under control by
   // configuration management.
   BooleanPrefMember pref_sync_managed_;
 
   // Groups of prefs that always have the same value as a "master" pref.
   // For example, the APPS group has {APP_NOTIFICATIONS, APP_SETTINGS}
   // (as well as APPS, but that is implied), so
   //   pref_groups_[syncer::APPS] =       { syncer::APP_NOTIFICATIONS,
   //                                          syncer::APP_SETTINGS }
   //   pref_groups_[syncer::EXTENSIONS] = { syncer::EXTENSION_SETTINGS }
   // etc.
   typedef std::map<syncer::ModelType, syncer::ModelTypeSet> PrefGroupsMap;
   PrefGroupsMap pref_groups_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncPrefs);
 };
 
 }  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_SYNC_PREFS_H_