Added HostListApl implementation to connect to legacy directory and GCD.

remoting/webapp/crd/js/legacy_host_list_api.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
  * REST API for host-list management.
  */
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 (function() {
 
 'use strict';
 
 /**
  * @constructor
  * @implements {remoting.HostListApi}
  */
 remoting.LegacyHostListApi = function() {
 };
 
 /** @override */
 remoting.LegacyHostListApi.prototype.register = function(
     hostName, publicKey, hostClientId) {
   var newHostId = base.generateUuid();
+  return remoting.LegacyHostListApi.registerWithHostId(
+      newHostId, hostName, publicKey, hostClientId);

[John Williams, 2015/06/29 19:45:05]

I split the implementation of this method into a separate static method so it
can be called from CombinedHostListApi.

+};
+
+/**
+ * Registers a host with the Chromoting directory using a specified
+ * host ID, which should not be equal to the ID of any existing host.
+ *
+ * @param {string} newHostId The host ID of the new host.
+ * @param {string} hostName The user-visible name of the new host.
+ * @param {string} publicKey The public half of the host's key pair.
+ * @param {?string} hostClientId The OAuth2 client ID of the host.
+ * @return {!Promise<remoting.HostListApi.RegisterResult>}
+ */
+remoting.LegacyHostListApi.registerWithHostId = function(
+    newHostId, hostName, publicKey, hostClientId) {
   var newHostDetails = { data: {
     hostId: newHostId,
     hostName: hostName,
     publicKey: publicKey
   } };
 
   return new remoting.Xhr({
     method: 'POST',
     url: remoting.settings.DIRECTORY_API_BASE_URL + '/@me/hosts',
     urlParams: {
@@ skipping 150 matching lines @@
         throw remoting.Error.unexpected();
       }
     } else if (xhrResponse.status == 404) {
       throw new remoting.Error(remoting.Error.Tag.INVALID_ACCESS_CODE);
     } else {
       throw remoting.Error.fromHttpStatus(xhrResponse.status);
     }
   });
 };
 
+/** @override */
+remoting.LegacyHostListApi.prototype.getHostIdFromConfig = function(config) {
+  return base.getStringAttr(config, 'host_id');
+};
+
 })();