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

chrome/browser/chromeos/drive/file_write_watcher_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_write_watcher.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
@@ skipping 45 matching lines @@
   // interface is running on UI thread) and FILE thread (Linux version of
   // base::FilePathWatcher needs to live on an IOAllowed thread with TYPE_IO,
   // which is FILE thread in the production environment).
   //
   // By using the IO_MAINLOOP test thread bundle, the main thread is used
   // both as UI and FILE thread, with TYPE_IO message loop.
   FileWriteWatcherTest()
       : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP) {
   }
 
-  virtual void SetUp() override {
-    ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
-  }
+  void SetUp() override { ASSERT_TRUE(temp_dir_.CreateUniqueTempDir()); }
 
   base::FilePath GetTempPath(const std::string& name) {
     return temp_dir_.path().Append(name);
   }
 
  private:
   content::TestBrowserThreadBundle thread_bundle_;
   base::ScopedTempDir temp_dir_;
 };
 
@@ skipping 32 matching lines @@
 
   // Unwatched write. It shouldn't be notified.
   WriteSomethingAfterStartWatch(path4, true);
 
   // The loop should quit if all the three paths are notified to be written.
   loop.Run();
 }
 
 }  // namespace internal
 }  // namespace drive