Convert WindowOpenDisposition to an enum class.

chrome/browser/chromeos/login/demo_mode/demo_app_launcher.cc

 // 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/chromeos/login/demo_mode/demo_app_launcher.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
@@ skipping 76 matching lines @@
     return;
   }
 
   // Disable network before launching the app.
   LOG(WARNING) << "Disabling network before launching demo app..";
   NetworkStateHandler* handler = NetworkHandler::Get()->network_state_handler();
   handler->SetTechnologyEnabled(NetworkTypePattern::NonVirtual(),
                                 false,
                                 chromeos::network_handler::ErrorCallback());
 
-  OpenApplication(
-      AppLaunchParams(profile, extension, extensions::LAUNCH_CONTAINER_WINDOW,
-                      NEW_WINDOW, extensions::SOURCE_CHROME_INTERNAL, true));
+  OpenApplication(AppLaunchParams(profile, extension,
+                                  extensions::LAUNCH_CONTAINER_WINDOW,
+                                  WindowOpenDisposition::NEW_WINDOW,
+                                  extensions::SOURCE_CHROME_INTERNAL, true));
   KioskAppManager::Get()->InitSession(profile, extension_id);
 
   user_manager::UserManager::Get()->SessionStarted();
 
   LoginDisplayHost::default_host()->Finalize();
 }
 
 void DemoAppLauncher::OnProfileLoadFailed(KioskAppLaunchError::Error error) {
   LOG(ERROR) << "Loading the Kiosk Profile failed: " <<
       KioskAppLaunchError::GetErrorMessage(error);
 }
 
 }  // namespace chromeos