Updated remoting.xhr API to use promises. Removed access to the native

remoting/webapp/crd/js/oauth2.js

Index: remoting/webapp/crd/js/oauth2.js
diff --git a/remoting/webapp/crd/js/oauth2.js b/remoting/webapp/crd/js/oauth2.js
index 69edafc3af679888d4ce7e00ca651d03775c8915..37570b82d9ad0f3c6b39bc94e3eae57ebbf25c5f 100644
--- a/remoting/webapp/crd/js/oauth2.js
+++ b/remoting/webapp/crd/js/oauth2.js
@@ -250,7 +250,7 @@ remoting.OAuth2.prototype.onTokens_ =
 remoting.OAuth2.prototype.getAuthorizationCode = function(onDone) {
   var xsrf_token = base.generateXsrfToken();
   var GET_CODE_URL = this.getOAuth2AuthEndpoint_() + '?' +
-    remoting.xhr.urlencodeParamHash({
+    remoting.Xhr.urlencodeParamHash({
           'client_id': this.getClientId_(),
           'redirect_uri': this.getRedirectUri_(),
           'scope': this.SCOPE_,
@@ -323,7 +323,7 @@ remoting.OAuth2.prototype.doAuthRedirect = function(onDone) {
 remoting.OAuth2.prototype.exchangeCodeForToken = function(code, onDone) {
   /** @param {!remoting.Error} error */
   var onError = function(error) {
-    console.error('Unable to exchange code for token: ', error);
+    console.error('Unable to exchange code for token: ' + error.toString());
   };
 
   remoting.oauth2Api.exchangeCodeForTokens(
@@ -375,7 +375,7 @@ remoting.OAuth2.prototype.getToken = function() {
         resolve(that.getAccessTokenInternal_()['token']);
       }
     } else {
-      reject(remoting.Error.NOT_AUTHENTICATED);
+      reject(new remoting.Error(remoting.Error.Tag.NOT_AUTHENTICATED));
     }
   });
 };