Convert WindowOpenDisposition to an enum class.

chrome/browser/extensions/extension_uninstall_dialog.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 "chrome/browser/extensions/extension_uninstall_dialog.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 177 matching lines @@
   }
 
   delegate_->OnExtensionUninstallDialogClosed(success, error);
 }
 
 void ExtensionUninstallDialog::HandleReportAbuse() {
   chrome::NavigateParams params(
       profile_,
       extension_urls::GetWebstoreReportAbuseUrl(extension_->id(), kReferrerId),
       ui::PAGE_TRANSITION_LINK);
-  params.disposition = NEW_FOREGROUND_TAB;
+  params.disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
   chrome::Navigate(&params);
 }
 
 }  // namespace extensions