Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/views/proximity_auth/proximity_auth_error_bubble_view.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/views/proximity_auth/proximity_auth_error_bubble_view.h"
 
 #include "base/lazy_instance.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/ui/proximity_auth/proximity_auth_error_bubble.h"
 #include "chrome/grit/theme_resources.h"
@@ skipping 120 matching lines @@
   GetWidget()->Close();
 }
 
 void ProximityAuthErrorBubbleView::StyledLabelLinkClicked(
     views::StyledLabel* label,
     const gfx::Range& range,
     int event_flags) {
   if (!web_contents())
     return;
 
-  web_contents()->OpenURL(
-      content::OpenURLParams(link_url_, content::Referrer(), NEW_FOREGROUND_TAB,
-                             ui::PAGE_TRANSITION_LINK, false));
+  web_contents()->OpenURL(content::OpenURLParams(
+      link_url_, content::Referrer(), WindowOpenDisposition::NEW_FOREGROUND_TAB,
+      ui::PAGE_TRANSITION_LINK, false));
 }