[AppRemoting] Break out AppRemoting shared module (re-land).

remoting/webapp/crd/js/desktop_remoting.js

 // Copyright 2014 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
  * This class implements the functionality that is specific to desktop
  * remoting ("Chromoting" or CRD).
  */
 
@@ skipping 30 matching lines @@
 /**
  * Get the connection mode (Me2Me or IT2Me).
  *
  * @return {remoting.DesktopRemoting.Mode}
  */
 remoting.DesktopRemoting.prototype.getConnectionMode = function() {
   return this.connectionMode_;
 };
 
 /**
+ * @return {string} Application Id.
+ * @override {remoting.ApplicationInterface}
+ */
+remoting.DesktopRemoting.prototype.getApplicationId = function() {
+  // Application IDs are not used in desktop remoting.
+  return '';
+};
+
+/**
  * @return {string} Application product name to be used in UI.
  * @override {remoting.ApplicationInterface}
  */
 remoting.DesktopRemoting.prototype.getApplicationName = function() {
   return chrome.i18n.getMessage(/*i18n-content*/'PRODUCT_NAME');
 };
 
 /**
  * @param {!remoting.Error} error The failure reason.
  * @override {remoting.ApplicationInterface}
@@ skipping 176 matching lines @@
  * Entry-point for It2Me connections.
  *
  * @private
  */
 remoting.DesktopRemoting.prototype.connectIt2Me_ = function() {
   base.dispose(this.activity_);
   this.activity_ = new remoting.It2MeActivity();
   this.activity_.start();
   this.connectionMode_ = remoting.DesktopRemoting.Mode.IT2ME;
 };