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

chrome/browser/chromeos/drive/file_system/get_file_for_saving_operation_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/file_system/get_file_for_saving_operation.h"
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/run_loop.h"
@@ skipping 19 matching lines @@
  public:
   void set_quit_closure(const base::Closure& quit_closure) {
     quit_closure_ = quit_closure;
   }
 
   const std::string& updated_local_id() const {
     return updated_local_id_;
   }
 
   // OperationDelegate overrides.
-  virtual void OnEntryUpdatedByOperation(const ClientContext& /* context */,
-                                         const std::string& local_id) override {
+  void OnEntryUpdatedByOperation(const ClientContext& /* context */,
+                                 const std::string& local_id) override {
     updated_local_id_ = local_id;
     if (!quit_closure_.is_null())
       quit_closure_.Run();
   }
 
  private:
   std::string updated_local_id_;
   base::Closure quit_closure_;
 };
 
 }  // namespace
 
 class GetFileForSavingOperationTest : public OperationTestBase {
  protected:
   // FileWriteWatcher requires TYPE_IO message loop to run.
   GetFileForSavingOperationTest()
       : OperationTestBase(content::TestBrowserThreadBundle::IO_MAINLOOP) {
   }
 
-  virtual void SetUp() override {
+  void SetUp() override {
     OperationTestBase::SetUp();
 
     operation_.reset(new GetFileForSavingOperation(
         logger(), blocking_task_runner(), &delegate_, scheduler(), metadata(),
         cache(), temp_dir()));
     operation_->file_write_watcher_for_testing()->DisableDelayForTesting();
   }
 
   TestDelegate delegate_;
   scoped_ptr<GetFileForSavingOperation> operation_;
@@ skipping 72 matching lines @@
       google_apis::test_util::CreateCopyResultCallback(
           &error, &local_path, &entry));
   content::RunAllBlockingPoolTasksUntilIdle();
 
   // Checks that an error is returned.
   EXPECT_EQ(FILE_ERROR_EXISTS, error);
 }
 
 }  // namespace file_system
 }  // namespace drive