Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/ash/cast_config_delegate_chromeos.cc

 // Copyright 2015 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/ash/cast_config_delegate_chromeos.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
@@ skipping 91 matching lines @@
 
 bool CastConfigDelegateChromeos::HasOptions() const {
   return true;
 }
 
 void CastConfigDelegateChromeos::LaunchCastOptions() {
   chrome::NavigateParams params(
       ProfileManager::GetActiveUserProfile(),
       FindCastExtension()->GetResourceURL("options.html"),
       ui::PAGE_TRANSITION_LINK);
-  params.disposition = NEW_FOREGROUND_TAB;
+  params.disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
   params.window_action = chrome::NavigateParams::SHOW_WINDOW;
   chrome::Navigate(&params);
 }
 
 void CastConfigDelegateChromeos::AddObserver(
     ash::CastConfigDelegate::Observer* observer) {
   return extensions::CastDeviceUpdateListeners::Get(GetProfile())
       ->AddObserver(observer);
 }
 
 void CastConfigDelegateChromeos::RemoveObserver(
     ash::CastConfigDelegate::Observer* observer) {
   return extensions::CastDeviceUpdateListeners::Get(GetProfile())
       ->RemoveObserver(observer);
 }
 
 }  // namespace chromeos