Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/views/extensions/extension_install_dialog_view.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/ui/views/extensions/extension_install_dialog_view.h"
 
 #include <stddef.h>
 #include <algorithm>
 #include <string>
 #include <utility>
@@ skipping 519 matching lines @@
 
 ui::ModalType ExtensionInstallDialogView::GetModalType() const {
   return prompt_->ShouldUseTabModalDialog() ? ui::MODAL_TYPE_CHILD
                                             : ui::MODAL_TYPE_WINDOW;
 }
 
 void ExtensionInstallDialogView::LinkClicked(views::Link* source,
                                              int event_flags) {
   GURL store_url(extension_urls::GetWebstoreItemDetailURLPrefix() +
                  prompt_->extension()->id());
-  OpenURLParams params(
-      store_url, Referrer(), NEW_FOREGROUND_TAB,
-      ui::PAGE_TRANSITION_LINK,
-      false);
+  OpenURLParams params(store_url, Referrer(),
+                       WindowOpenDisposition::NEW_FOREGROUND_TAB,
+                       ui::PAGE_TRANSITION_LINK, false);
 
   if (navigator_) {
     navigator_->OpenURL(params);
   } else {
     chrome::ScopedTabbedBrowserDisplayer displayer(profile_);
     displayer.browser()->OpenURL(params);
   }
   GetWidget()->Close();
 }
 
@@ skipping 179 matching lines @@
       expanded ? gfx::VectorIconId::FIND_PREV : gfx::VectorIconId::FIND_NEXT,
       gfx::kChromeIconGrey);
   arrow_toggle_->SetImage(views::Button::STATE_NORMAL, &icon);
 }
 
 // static
 ExtensionInstallPrompt::ShowDialogCallback
 ExtensionInstallPrompt::GetViewsShowDialogCallback() {
   return base::Bind(&ShowExtensionInstallDialogImpl);
 }