Report the Auth method for me2me connections.

remoting/webapp/base/js/client_session.js

 // Copyright (c) 2012 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
  * Class handling creation and teardown of a remoting client session.
  *
  * The ClientSession class controls lifetime of the client plugin
  * object and provides the plugin with the functionality it needs to
@@ skipping 532 matching lines @@
         new base.RepeatingTimer(this.reportStatistics.bind(this), 1000));
     if (this.plugin_.hasCapability(
           remoting.ClientSession.Capability.TOUCH_EVENTS)) {
       this.plugin_.enableTouchEvents(true);
     }
   } else if (this.isFinished()) {
     base.dispose(this.connectedDisposables_);
     this.connectedDisposables_ = null;
   }
 
+  this.logAuthMethod_();
   this.notifyStateChanges_(oldState, this.state_);
   // Record state count in an UMA enumerated histogram.
   recordState(this.state_);
   this.logger_.logClientSessionStateChange(
       this.state_, this.error_, this.xmppErrorCache_.getFirstError());
 };
 
+/** @private */
+remoting.ClientSession.prototype.logAuthMethod_ = function() {
+  // The AuthMethod is undefined before the AUTHENTICATED stage for a
+  // successful connection or the FAILED stage for a failed connection.
+  if (this.state_ == remoting.ClientSession.State.AUTHENTICATED ||
+      this.state_ == remoting.ClientSession.State.FAILED) {
+    var authMethod = this.credentialsProvider_.getAuthMethod();
+    if (authMethod != null) {
+      this.logger_.setAuthMethod(authMethod);
+    }
+  }
+};
+
 /**
  * Records a Chromoting Connection State, stored in an UMA enumerated histogram.
  * @param {remoting.ClientSession.State} state State identifier.
  */
 function recordState(state) {
   // According to src/base/metrics/histogram.h, for a UMA enumerated histogram,
   // the upper limit should be 1 above the max-enum.
   var histogram_max = remoting.ClientSession.State.MAX_STATE_ENUM -
       remoting.ClientSession.State.MIN_STATE_ENUM + 1;
 
@@ skipping 83 matching lines @@
   } else if (previous == State.CONNECTED && current == State.FAILED) {
     return State.CONNECTION_DROPPED;
   }
   return current;
 };
 
 /** @private */
 remoting.ClientSession.prototype.reportStatistics = function() {
   this.logger_.logStatistics(this.plugin_.getPerfStats());
 };