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

remoting/webapp/base/js/application.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
  * Interface abstracting the Application functionality.
  */
 
 'use strict';
@@ skipping 90 matching lines @@
   } else {
     return 'Failed to get product version. Corrupt manifest?';
   }
 };
 
 /**
  * These functions must be overridden in the subclass.
  */
 
 /** @return {string} */
+remoting.Application.prototype.getApplicationId = function() {
+  base.debug.assert(false, 'Subclass must override');
+};
+
+/** @return {string} */
 remoting.Application.prototype.getApplicationName = function() {
   base.debug.assert(false, 'Subclass must override');
 };
 
 /**
  * @return {remoting.Activity}  The Current activity.
  */
 remoting.Application.prototype.getActivity = function() {
   base.debug.assert(false, 'Subclass must override');
 };
@@ skipping 26 matching lines @@
 
 /**
  * The interface specifies the methods that a subclass of remoting.Application
  * is required implement to override the default behavior.
  *
  * @interface
  */
 remoting.ApplicationInterface = function() {};
 
 /**
+ * @return {string} Application Id.
+ */
+remoting.ApplicationInterface.prototype.getApplicationId = function() {};
+
+/**
  * @return {string} Application product name to be used in UI.
  */
 remoting.ApplicationInterface.prototype.getApplicationName = function() {};
 
 /**
  * Report an authentication error to the user. This is called in lieu of
  * startApplication() if the user cannot be authenticated or if they decline
  * the app permissions.
  *
  * @param {!remoting.Error} error The failure reason.
@@ skipping 18 matching lines @@
  */
 remoting.ApplicationInterface.prototype.startApplication_ = function(token) {};
 
 /**
  * Close down the application before exiting.
  */
 remoting.ApplicationInterface.prototype.exitApplication_ = function() {};
 
 /** @type {remoting.Application} */
 remoting.app = null;