Update {virtual,override,final} to follow C++11 style in chrome/browser/chromeos/drive.

chrome/browser/chromeos/drive/sync/entry_revert_performer_unittest.cc

 // Copyright 2013 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/chromeos/drive/sync/entry_revert_performer.h"
 
 #include "base/task_runner_util.h"
 #include "chrome/browser/chromeos/drive/file_change.h"
 #include "chrome/browser/chromeos/drive/file_system/operation_test_base.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/browser/chromeos/drive/job_scheduler.h"
 #include "chrome/browser/chromeos/drive/resource_metadata.h"
 #include "chrome/browser/drive/fake_drive_service.h"
 #include "content/public/test/test_utils.h"
 #include "google_apis/drive/test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace drive {
 namespace internal {
 
 class EntryRevertPerformerTest : public file_system::OperationTestBase {
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
    OperationTestBase::SetUp();
    performer_.reset(new EntryRevertPerformer(blocking_task_runner(),
                                              delegate(),
                                              scheduler(),
                                              metadata()));
   }
 
   scoped_ptr<EntryRevertPerformer> performer_;
 };
 
@@ skipping 108 matching lines @@
   // Verify the entry was deleted locally.
   EXPECT_EQ(FILE_ERROR_NOT_FOUND,
             GetLocalResourceEntryById(entry.local_id(), &entry));
 
   EXPECT_EQ(1U, delegate()->get_changed_files().size());
   EXPECT_TRUE(delegate()->get_changed_files().count(path));
 }
 
 }  // namespace internal
 }  // namespace drive