Support creating progress bar notification for Windows

chrome/common/extensions/api/notifications.idl

 // Copyright (c) 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.
 
 // Use the <code>chrome.notifications</code> API to create rich notifications
 // using templates and show these notifications to users in the system tray.
 namespace notifications {
   [noinline_doc] enum TemplateType {
     // icon, title, message, expandedMessage, up to two buttons
     basic,
 
     // icon, title, message, expandedMessage, image, up to two buttons
     image,
 
     // icon, title, message, items, up to two buttons
-    list
+    list,
+
+    // icon, title, message, progress, up to two buttons
+    progress
   };
 
   dictionary NotificationItem {
     // Title of one item of a list notification.
     DOMString title;
 
     // Additional details about this item.
     DOMString message;
   };
 
@@ skipping 36 matching lines @@
 
     // Secondary notification content.
     [nodoc] DOMString? expandedMessage;
 
     // Image thumbnail for image-type notifications.
     DOMString? imageUrl;
     [nodoc] NotificationBitmap? imageBitmap;
 
     // Items for multi-item notifications.
     NotificationItem[]? items;
+
+    // Current progress ranges from 0 to 100.
+    long? progress;
   };
 
   callback CreateCallback = void (DOMString notificationId);
 
   callback UpdateCallback = void (boolean wasUpdated);
 
   callback ClearCallback = void (boolean wasCleared);
 
   callback GetAllCallback = void (object notifications);
 
@@ skipping 30 matching lines @@
     static void onClosed(DOMString notificationId, boolean byUser);
 
     // The user clicked in a non-button area of the notification.
     static void onClicked(DOMString notificationId);
 
     // The user pressed a button in the notification.
     static void onButtonClicked(DOMString notificationId, long buttonIndex);
   };
 
 };