Add a Record button to the web-app if the host supports video recording.

remoting/webapp/js_proto/chrome_proto.js

 // 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.
 
 // This file contains various hacks needed to inform JSCompiler of various
 // WebKit- and Chrome-specific properties and methods. It is used only with
 // JSCompiler to verify the type-correctness of our code.
 
 /** @type {Object} */
 var chrome = {};
@@ skipping 223 matching lines @@
 OnClickData.prototype.selectionText;
 /** @type {boolean} */
 OnClickData.prototype.editable;
 /** @type {boolean} */
 OnClickData.prototype.wasChecked;
 /** @type {boolean} */
 OnClickData.prototype.checked;
 
 
 /** @type {Object} */
+chrome.fileSystem = {
+  /**
+   * @param {Object.<string>?} options
+   * @param {function(Entry, Array.<FileEntry>):void} callback
+   */
+  chooseEntry: function(options, callback) {},
+  /**
+   * @param {FileEntry} fileEntry
+   * @param {function(string):void} callback
+   */
+  getDisplayPath: function(fileEntry, callback) {}
+};
+
+/** @type {Object} */
 chrome.identity = {
   /**
    * @param {Object.<string>} parameters
    * @param {function(string):void} callback
    */
   getAuthToken: function(parameters, callback) {},
   /**
    * @param {Object.<string>} parameters
    * @param {function():void} callback
    */
@@ skipping 246 matching lines @@
  */
 chrome.cast.initialize =
     function(apiConfig, onInitSuccess, onInitError) {};
 
 /**
  * @param {function(chrome.cast.Session):void} successCallback
  * @param {function(chrome.cast.Error):void} errorCallback
  */
 chrome.cast.requestSession =
     function(successCallback, errorCallback) {};
-