Convert WindowOpenDisposition to an enum class.

chrome/browser/printing/cloud_print/privet_notifications.cc

 // Copyright 2013 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/printing/cloud_print/privet_notifications.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 359 matching lines @@
 
   DCHECK_EQ(1, button_index);
   ReportPrivetUmaEvent(PRIVET_DISABLE_NOTIFICATIONS_CLICKED);
   DisableNotifications();
 }
 
 void PrivetNotificationDelegate::OpenTab(const GURL& url) {
   Profile* profile = Profile::FromBrowserContext(profile_);
   chrome::NavigateParams params(profile, url,
                                 ui::PAGE_TRANSITION_AUTO_TOPLEVEL);
-  params.disposition = NEW_FOREGROUND_TAB;
+  params.disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
   chrome::Navigate(&params);
 }
 
 void PrivetNotificationDelegate::DisableNotifications() {
   Profile* profile = Profile::FromBrowserContext(profile_);
   profile->GetPrefs()->SetBoolean(prefs::kLocalDiscoveryNotificationsEnabled,
                                   false);
 }
 
 }  // namespace cloud_print