Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/views/frame/browser_view.cc

 // Copyright 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/frame/browser_view.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 1489 matching lines @@
   // Currently, Textfield (which covers the omnibox and find bar, and likely any
   // other native UI in the future that wants to deal with clipboard commands)
   // does the above.
   ui::Accelerator accelerator;
   GetAccelerator(command_id, &accelerator);
   GetFocusManager()->ProcessAccelerator(accelerator);
 }
 
 WindowOpenDisposition BrowserView::GetDispositionForPopupBounds(
     const gfx::Rect& bounds) {
-  return NEW_POPUP;
+  return WindowOpenDisposition::NEW_POPUP;
 }
 
 FindBar* BrowserView::CreateFindBar() {
   return new FindBarHost(this);
 }
 
 WebContentsModalDialogHost* BrowserView::GetWebContentsModalDialogHost() {
   return GetBrowserViewLayout()->GetWebContentsModalDialogHost();
 }
 
@@ skipping 1134 matching lines @@
 }
 
 extensions::ActiveTabPermissionGranter*
 BrowserView::GetActiveTabPermissionGranter() {
   content::WebContents* web_contents = GetActiveWebContents();
   if (!web_contents)
     return nullptr;
   return extensions::TabHelper::FromWebContents(web_contents)
       ->active_tab_permission_granter();
 }