Report the Auth method for me2me connections.

remoting/webapp/base/js/chromoting_event.js

 // Copyright 2015 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.
 
 // `7MM"""Mq.                       `7MM
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@@ skipping 74 matching lines @@
   this.signal_strategy_type;
   /** @type {remoting.ChromotingEvent.SignalStrategyProgress} */
   this.signal_strategy_progress;
   /** @type {?remoting.ChromotingEvent.XmppError} */
   this.xmpp_error;
   /** @type {remoting.ChromotingEvent.SessionEntryPoint} */
   this.session_entry_point;
   /** @type {number} */
   this.host_status_update_elapsed_time;
 
+  /** @type {remoting.ChromotingEvent.AuthMethod} */
+  this.auth_method;
+
   this.init_();
 };
 
 /** @private */
 remoting.ChromotingEvent.prototype.init_ = function() {
   // System Info.
   var systemInfo = remoting.getSystemInfo();
   this.cpu = systemInfo.cpu;
   this.os_version = systemInfo.osVersion;
   if (systemInfo.osName === remoting.Os.WINDOWS) {
@@ skipping 172 matching lines @@
 };
 
 /** @enum {number} */
 remoting.ChromotingEvent.SignalStrategyProgress = {
   SUCCEEDED: 1,
   FAILED: 2,
   TIMED_OUT: 3,
   SUCCEEDED_LATE: 4,
   FAILED_LATE: 5
 };
+
+/** @enum {number} */
+remoting.ChromotingEvent.AuthMethod = {
+  PIN: 1,
+  ACCESS_CODE: 2,
+  PINLESS: 3,
+  THIRD_PARTY: 4,
+};