Standardize usage of virtual/override/final in components/

components/sync_driver/shared_change_processor_ref.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_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_REF_H_
 #define COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_REF_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "components/sync_driver/shared_change_processor.h"
 #include "sync/api/sync_change_processor.h"
 #include "sync/api/sync_error_factory.h"
 
 namespace sync_driver {
 
 // A syncer::SyncChangeProcessor stub for interacting with a refcounted
 // SharedChangeProcessor.
 class SharedChangeProcessorRef : public syncer::SyncChangeProcessor,
                                  public syncer::SyncErrorFactory {
  public:
   SharedChangeProcessorRef(
       const scoped_refptr<SharedChangeProcessor>&
           change_processor);
-  virtual ~SharedChangeProcessorRef();
+  ~SharedChangeProcessorRef() override;
 
   // syncer::SyncChangeProcessor implementation.
-  virtual syncer::SyncError ProcessSyncChanges(
+  syncer::SyncError ProcessSyncChanges(
       const tracked_objects::Location& from_here,
       const syncer::SyncChangeList& change_list) override;
-  virtual syncer::SyncDataList GetAllSyncData(
-      syncer::ModelType type) const override;
-  virtual syncer::SyncError UpdateDataTypeContext(
+  syncer::SyncDataList GetAllSyncData(syncer::ModelType type) const override;
+  syncer::SyncError UpdateDataTypeContext(
       syncer::ModelType type,
       syncer::SyncChangeProcessor::ContextRefreshStatus refresh_status,
       const std::string& context) override;
 
   // syncer::SyncErrorFactory implementation.
-  virtual syncer::SyncError CreateAndUploadError(
+  syncer::SyncError CreateAndUploadError(
       const tracked_objects::Location& from_here,
       const std::string& message) override;
 
   // Default copy and assign welcome (and safe due to refcounted-ness).
 
  private:
   scoped_refptr<SharedChangeProcessor> change_processor_;
 };
 
 }  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_REF_H_