Standardize usage of virtual/override/final in ui/

ui/web_dialogs/web_dialog_ui.cc

 // 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.
 
 #include "ui/web_dialogs/web_dialog_ui.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/lazy_instance.h"
 #include "base/values.h"
@@ skipping 10 matching lines @@
 namespace ui {
 
 namespace {
 
 const char kWebDialogDelegateUserDataKey[] = "WebDialogDelegateUserData";
 
 class WebDialogDelegateUserData : public base::SupportsUserData::Data {
  public:
   explicit WebDialogDelegateUserData(WebDialogDelegate* delegate)
       : delegate_(delegate) {}
-  virtual ~WebDialogDelegateUserData() {}
+  ~WebDialogDelegateUserData() override {}
   WebDialogDelegate* delegate() { return delegate_; }
 
  private:
   WebDialogDelegate* delegate_;  // unowned
 };
 
 }  // namespace
 
 WebDialogUI::WebDialogUI(content::WebUI* web_ui)
     : WebUIController(web_ui) {
@@ skipping 77 matching lines @@
   // for security reasons. The code hosting the dialog should provide
   // dialog specific functionality through other bindings and methods
   // that are scoped in duration to the dialogs existence.
   web_ui->SetBindings(web_ui->GetBindings() & ~content::BINDINGS_POLICY_WEB_UI);
 }
 
 ExternalWebDialogUI::~ExternalWebDialogUI() {
 }
 
 }  // namespace ui