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);
+};
+
+/**
+ * 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: {
       hostClientId: hostClientId
     },
     jsonContent: newHostDetails,
     acceptJson: true,
     useIdentity: true
   }).start().then(function(response) {
     if (response.status == 200) {
       var result = /** @type {!Object} */ (response.getJson());
       var data = base.getObjectAttr(result, 'data');
-      var authCode = base.getStringAttr(data, 'authorizationCode');
+      var authCode = hostClientId ?
+          base.getStringAttr(data, 'authorizationCode') :
+          '';
       return {
         authCode: authCode,
         email: '',
         hostId: newHostId
       };
     } else {
       console.log(
           'Failed to register the host. Status: ' + response.status +
           ' response: ' + response.getText());
       throw new remoting.Error(remoting.Error.Tag.REGISTRATION_FAILED);
@@ skipping 132 matching lines @@
       }
     } else if (xhrResponse.status == 404) {
       throw new remoting.Error(remoting.Error.Tag.INVALID_ACCESS_CODE);
     } else {
       throw remoting.Error.fromHttpStatus(xhrResponse.status);
     }
   });
 };
 
 })();