Update {virtual,override} to follow C++11 style in chrome.

chrome/browser/chrome_browser_main_win.h

 // Copyright (c) 2012 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.
 
 // Contains functions used by BrowserMain() that are win32-specific.
 
 #ifndef CHROME_BROWSER_CHROME_BROWSER_MAIN_WIN_H_
 #define CHROME_BROWSER_CHROME_BROWSER_MAIN_WIN_H_
 
 #include "base/files/file_path_watcher.h"
 #include "chrome/browser/chrome_browser_main.h"
 
 class DidRunUpdater;
 
 namespace base {
 class CommandLine;
 }
 
 // Handle uninstallation when given the appropriate the command-line switch.
 // If |chrome_still_running| is true a modal dialog will be shown asking the
 // user to close the other chrome instance.
 int DoUninstallTasks(bool chrome_still_running);
 
 class ChromeBrowserMainPartsWin : public ChromeBrowserMainParts {
  public:
   explicit ChromeBrowserMainPartsWin(
       const content::MainFunctionParams& parameters);
 
-  virtual ~ChromeBrowserMainPartsWin();
+  ~ChromeBrowserMainPartsWin() override;
 
   // BrowserParts overrides.
-  virtual void ToolkitInitialized() override;
-  virtual void PreMainMessageLoopStart() override;
-  virtual int PreCreateThreads() override;
+  void ToolkitInitialized() override;
+  void PreMainMessageLoopStart() override;
+  int PreCreateThreads() override;
 
   // ChromeBrowserMainParts overrides.
-  virtual void ShowMissingLocaleMessageBox() override;
-  virtual void PostProfileInit() override;
-  virtual void PostBrowserStart() override;
+  void ShowMissingLocaleMessageBox() override;
+  void PostProfileInit() override;
+  void PostBrowserStart() override;
 
   // Prepares the localized strings that are going to be displayed to
   // the user if the browser process dies. These strings are stored in the
   // environment block so they are accessible in the early stages of the
   // chrome executable's lifetime.
   static void PrepareRestartOnCrashEnviroment(
       const base::CommandLine& parsed_command_line);
 
   // Registers Chrome with the Windows Restart Manager, which will restore the
   // Chrome session when the computer is restarted after a system update.
@@ skipping 22 matching lines @@
 #endif
 #if defined(KASKO)
   // Cleans up Kasko crash reports that exceeded the maximum upload attempts.
   base::FilePathWatcher failed_kasko_crash_report_watcher_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainPartsWin);
 };
 
 #endif  // CHROME_BROWSER_CHROME_BROWSER_MAIN_WIN_H_