MD History: Support dynamically updating synced tab data

chrome/browser/resources/history/externs.js

 // Copyright 2015 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.
 
 /**
  * @fileoverview Externs for objects sent from C++ to chrome://history.
  * @externs
  */
 
 /**
@@ skipping 31 matching lines @@
 var HistoryQuery;
 
 /**
  * The type of the foreign session info object. This definition is based on
  * chrome/browser/ui/webui/foreign_session_handler.cc:
  * @typedef {{collapsed: boolean,
  *            deviceType: string,
  *            name: string,
  *            modifiedTime: string,
  *            tag: string,
+ *            timestamp: number,
  *            windows: Array}}
  */
 var ForeignSession;
 
 /**
  * The type of the foreign session tab object. This definition is based on
  * chrome/browser/ui/webui/foreign_session_handler.cc:
  * @typedef {{direction: string,
  *            sessionId: number,
  *            timestamp: number,
  *            title: string,
  *            type: string,
  *            url: string}}
  */
 var ForeignSessionTab;