UMA to track the reason for re-auth (draft).

chrome/browser/chromeos/login/screens/user_selection_screen.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/screens/user_selection_screen.h"
 
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part.h"
 #include "chrome/browser/chromeos/login/lock/screen_locker.h"
+#include "chrome/browser/chromeos/login/reauth_stats.h"
 #include "chrome/browser/chromeos/login/ui/login_display_host_impl.h"
 #include "chrome/browser/chromeos/login/ui/views/user_board_view.h"
 #include "chrome/browser/chromeos/login/users/chrome_user_manager.h"
 #include "chrome/browser/chromeos/login/users/multi_profile_user_controller.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/signin/easy_unlock_service.h"
 #include "chrome/browser/signin/proximity_auth_facade.h"
 #include "chrome/browser/ui/webui/chromeos/login/l10n_util.h"
 #include "chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h"
@@ skipping 205 matching lines @@
       user->GetType() == user_manager::USER_TYPE_PUBLIC_ACCOUNT;
 
   if (is_supervised_user &&
       token_status == user_manager::User::OAUTH_TOKEN_STATUS_UNKNOWN) {
     return false;
   }
 
   if (is_public_session)
     return false;
 
+  // At this point the reason for invalid token should be already set. If not,
+  // this might be a leftover from an old version.
+  if (token_status == user_manager::User::OAUTH2_TOKEN_STATUS_INVALID)
+    RecordReauthReason(user->email(), ReauthReason::OTHER);
+
   return user->force_online_signin() ||
          (token_status == user_manager::User::OAUTH2_TOKEN_STATUS_INVALID) ||
          (token_status == user_manager::User::OAUTH_TOKEN_STATUS_UNKNOWN);
 }
 
 void UserSelectionScreen::SetHandler(LoginDisplayWebUIHandler* handler) {
   handler_ = handler;
 }
 
 void UserSelectionScreen::SetView(UserBoardView* view) {
@@ skipping 170 matching lines @@
     token_handle_util_->CheckToken(
         user_id, base::Bind(&UserSelectionScreen::OnUserStatusChecked,
                             weak_factory_.GetWeakPtr()));
   }
 }
 
 void UserSelectionScreen::OnUserStatusChecked(
     const user_manager::UserID& user_id,
     TokenHandleUtil::TokenHandleStatus status) {
   if (status == TokenHandleUtil::INVALID) {
+    RecordReauthReason(user_id, ReauthReason::INVALID_TOKEN_HANDLE);
     user_manager::UserManager::Get()->SaveUserOAuthStatus(
         user_id, user_manager::User::OAUTH2_TOKEN_STATUS_INVALID);
     token_handle_util_->DeleteToken(user_id);
     SetAuthType(user_id, ONLINE_SIGN_IN, base::string16());
   }
 }
 
 // EasyUnlock stuff
 
 void UserSelectionScreen::SetAuthType(const std::string& user_id,
@@ skipping 112 matching lines @@
   // The user profile should exist if and only if this is the lock screen.
   DCHECK_EQ(!!profile, GetScreenType() == LOCK_SCREEN);
 
   if (!profile)
     profile = profile_helper->GetSigninProfile();
 
   return EasyUnlockService::Get(profile);
 }
 
 }  // namespace chromeos