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

remoting/webapp/crd/js/session_connector_impl.js

Index: remoting/webapp/crd/js/session_connector_impl.js
diff --git a/remoting/webapp/crd/js/session_connector_impl.js b/remoting/webapp/crd/js/session_connector_impl.js
index 427d6a3f4bb88199299bc5ee5b6ecf3a2cd84165..0d9ea5b8c58244b80060fe1ee5b5414d9b8b52cd 100644
--- a/remoting/webapp/crd/js/session_connector_impl.js
+++ b/remoting/webapp/crd/js/session_connector_impl.js
@@ -75,6 +75,9 @@ remoting.SessionConnectorImpl = function(clientContainer, onConnected, onError,
 remoting.SessionConnectorImpl.prototype.resetConnection_ = function() {
   this.closeSession();
 
+  // It's OK to initialize these member variables here because the
+  // constructor calls this method.
+
   /** @private {remoting.Host} */
   this.host_ = null;
 
@@ -87,8 +90,6 @@ remoting.SessionConnectorImpl.prototype.resetConnection_ = function() {
   /** @private {remoting.ClientSession} */
   this.clientSession_ = null;
 
-  /** @private {XMLHttpRequest} */
-  this.pendingXhr_ = null;
 
   /** @private {remoting.CredentialsProvider} */
   this.credentialsProvider_ = null;