Standardize usage of virtual/override/final in sync/

sync/api/fake_syncable_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 SYNC_API_FAKE_SYNCABLE_SERVICE_H_
 #define SYNC_API_FAKE_SYNCABLE_SERVICE_H_
 
 #include "sync/api/syncable_service.h"
 
 namespace syncer {
 
 class SyncErrorFactory;
 
 // A fake SyncableService that can return arbitrary values and maintains the
 // syncing status.
 class FakeSyncableService : public SyncableService {
  public:
   FakeSyncableService();
-  virtual ~FakeSyncableService();
+  ~FakeSyncableService() override;
 
   // Setters for SyncableService implementation results.
   void set_merge_data_and_start_syncing_error(const SyncError& error);
   void set_process_sync_changes_error(const SyncError& error);
 
   // Whether we're syncing or not. Set on a successful MergeDataAndStartSyncing,
   // unset on StopSyncing. False by default.
   bool syncing() const;
 
   // SyncableService implementation.
-  virtual SyncMergeResult MergeDataAndStartSyncing(
+  SyncMergeResult MergeDataAndStartSyncing(
       ModelType type,
       const SyncDataList& initial_sync_data,
       scoped_ptr<SyncChangeProcessor> sync_processor,
       scoped_ptr<SyncErrorFactory> sync_error_factory) override;
-  virtual void StopSyncing(ModelType type) override;
-  virtual SyncDataList GetAllSyncData(ModelType type) const override;
-  virtual SyncError ProcessSyncChanges(
-      const tracked_objects::Location& from_here,
-      const SyncChangeList& change_list) override;
+  void StopSyncing(ModelType type) override;
+  SyncDataList GetAllSyncData(ModelType type) const override;
+  SyncError ProcessSyncChanges(const tracked_objects::Location& from_here,
+                               const SyncChangeList& change_list) override;
 
  private:
   scoped_ptr<SyncChangeProcessor> sync_processor_;
   SyncError merge_data_and_start_syncing_error_;
   SyncError process_sync_changes_error_;
   bool syncing_;
   ModelType type_;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_API_FAKE_SYNCABLE_SERVICE_H_