UMA to track the reason for re-auth

chrome/browser/chromeos/login/saml/saml_offline_signin_limiter.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/saml/saml_offline_signin_limiter.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
 #include "base/time/clock.h"
 #include "base/time/time.h"
+#include "chrome/browser/chromeos/login/reauth_stats.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/user_manager/user.h"
 #include "components/user_manager/user_manager.h"
 
 namespace chromeos {
 
 namespace {
@@ skipping 111 matching lines @@
 
 void SAMLOfflineSigninLimiter::ForceOnlineLogin() {
   const user_manager::User* user =
       ProfileHelper::Get()->GetUserByProfile(profile_);
   if (!user) {
     NOTREACHED();
     return;
   }
 
   user_manager::UserManager::Get()->SaveForceOnlineSignin(user->email(), true);
+  RecordReauthReason(user->email(), ReauthReason::SAML_REAUTH_POLICY);
   offline_signin_limit_timer_.reset();
 }
 
 }  // namespace chromeos