Standardize usage of virtual/override/final in chrome/browser/ui/

chrome/browser/ui/cocoa/profiles/user_manager_mac.mm

 // 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/ui/cocoa/profiles/user_manager_mac.h"
 
 #include "base/mac/foundation_util.h"
 #include "chrome/app/chrome_command_ids.h"
 #import "chrome/browser/app_controller_mac.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 15 matching lines @@
 // is reset to NULL when the window is closed.
 UserManagerMac* instance_ = NULL;  // Weak.
 
 // Custom WebContentsDelegate that allows handling of hotkeys.
 class UserManagerWebContentsDelegate : public content::WebContentsDelegate {
  public:
   UserManagerWebContentsDelegate() {}
 
   // WebContentsDelegate implementation. Forwards all unhandled keyboard events
   // to the current window.
-  virtual void HandleKeyboardEvent(
+  void HandleKeyboardEvent(
       content::WebContents* source,
       const content::NativeWebKeyboardEvent& event) override {
     if (![BrowserWindowUtils shouldHandleKeyboardEvent:event])
       return;
 
     // -getCommandId returns -1 if the event isn't a chrome accelerator.
     int chromeCommandId = [BrowserWindowUtils getCommandId:event];
 
     // Check for Cmd+A and Cmd+V events that could come from a password field.
     bool isTextEditingCommand =
@@ skipping 157 matching lines @@
                                            const std::string& url) {
   DCHECK(!instance_);
   instance_ = new UserManagerMac(guest_profile);
   [instance_->window_controller() showURL:GURL(url)];
 }
 
 void UserManagerMac::WindowWasClosed() {
   instance_ = NULL;
   delete this;
 }