Standardize usage of virtual/override/final in chrome/browser/sync_file_system/

chrome/browser/sync_file_system/drive_backend/sync_task_manager.cc

 // 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.
 
 #include "chrome/browser/sync_file_system/drive_backend/sync_task_manager.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/sequenced_task_runner.h"
 #include "chrome/browser/sync_file_system/drive_backend/sync_task.h"
 #include "chrome/browser/sync_file_system/drive_backend/sync_task_token.h"
 #include "chrome/browser/sync_file_system/sync_file_metadata.h"
 
 using storage::FileSystemURL;
 
 namespace sync_file_system {
 namespace drive_backend {
 
 namespace {
 
 class SyncTaskAdapter : public ExclusiveTask {
  public:
   explicit SyncTaskAdapter(const SyncTaskManager::Task& task) : task_(task) {}
-  virtual ~SyncTaskAdapter() {}
+  ~SyncTaskAdapter() override {}
 
-  virtual void RunExclusive(const SyncStatusCallback& callback) override {
+  void RunExclusive(const SyncStatusCallback& callback) override {
     task_.Run(callback);
   }
 
  private:
   SyncTaskManager::Task task_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncTaskAdapter);
 };
 
 }  // namespace
@@ skipping 361 matching lines @@
     closure.Run();
     return;
   }
 
   if (client_)
     client_->MaybeScheduleNextTask();
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system