Standardize usage of virtual/override/final specifiers.

chrome/browser/drive/drive_app_registry_unittest.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/drive/drive_app_registry.h"
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/values.h"
@@ skipping 22 matching lines @@
   // DriveAppRegistryObserver overrides:
   void OnDriveAppRegistryUpdated() override { ++update_count_; }
 
   DriveAppRegistry* registry_;
   int update_count_;
   DISALLOW_COPY_AND_ASSIGN(TestDriveAppRegistryObserver);
 };
 
 class DriveAppRegistryTest : public testing::Test {
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     fake_drive_service_.reset(new FakeDriveService);
     fake_drive_service_->LoadAppListForDriveApi("drive/applist.json");
 
     apps_registry_.reset(new DriveAppRegistry(fake_drive_service_.get()));
   }
 
   bool VerifyApp(const std::vector<DriveAppInfo>& list,
                  const std::string& app_id,
                  const std::string& app_name) {
     bool found = false;
@@ skipping 162 matching lines @@
       google_apis::test_util::CreateCopyResultCallback(&error));
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(error, google_apis::HTTP_NOT_FOUND);
 
   // Check that the number is not changed this time.
   apps_registry_->GetAppList(&apps);
   EXPECT_EQ(original_count - 1, apps.size());
 }
 
 }  // namespace drive