<webview>: Move JavaScript Dialog API to chrome

chrome/browser/guestview/webview/webview_permission_types.h

 // 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.
 
 #ifndef CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_PERMISSION_TYPES_H_
 #define CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_PERMISSION_TYPES_H_
 
 #include "content/public/common/browser_plugin_permission_type.h"
 
 enum WebViewPermissionType {
   WEB_VIEW_PERMISSION_TYPE_DOWNLOAD =
       BROWSER_PLUGIN_PERMISSION_TYPE_CONTENT_END + 1,
 
   WEB_VIEW_PERMISSION_TYPE_GEOLOCATION,
 
+  // JavaScript Dialogs: prompt, alert, confirm
+  // Note: Even through dialogs do not use the permission API, the dialog API
+  // is sufficiently similiar that it's convenient to consider it a permission
+  // type for code reuse.
+  WEB_VIEW_PERMISSION_TYPE_JAVASCRIPT_DIALOG,
+
   WEB_VIEW_PERMISSION_TYPE_LOAD_PLUGIN,
 
   // Media access (audio/video) permission request type.
   WEB_VIEW_PERMISSION_TYPE_MEDIA,
 
   WEB_VIEW_PERMISSION_TYPE_POINTER_LOCK
 };
 
 #endif  // CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_PERMISSION_TYPES_H_