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

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
index c631d08da1f776501fbe92458e6ad696a47c4784..1b24e33aa926928c1396880f24b9836d043d8135 100644
--- a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
@@ -32,6 +32,7 @@
 #include "chrome/browser/chromeos/login/error_screens_histogram_helper.h"
 #include "chrome/browser/chromeos/login/hwid_checker.h"
 #include "chrome/browser/chromeos/login/lock/screen_locker.h"
+#include "chrome/browser/chromeos/login/reauth_stats.h"
 #include "chrome/browser/chromeos/login/screens/core_oobe_actor.h"
 #include "chrome/browser/chromeos/login/screens/network_error.h"
 #include "chrome/browser/chromeos/login/startup_utils.h"
@@ -511,6 +512,10 @@ void SigninScreenHandler::RegisterMessages() {
               &SigninScreenHandler::HandleGetTouchViewState);
   AddCallback("logRemoveUserWarningShown",
               &SigninScreenHandler::HandleLogRemoveUserWarningShown);
+  AddCallback("firstIncorrectPasswordAttempt",
+              &SigninScreenHandler::HandleFirstIncorrectPasswordAttempt);
+  AddCallback("maxIncorrectPasswordAttempts",
+              &SigninScreenHandler::HandleMaxIncorrectPasswordAttempts);
 
   // This message is sent by the kiosk app menu, but is handled here
   // so we can tell the delegate to launch the app.
@@ -1088,6 +1093,8 @@ void SigninScreenHandler::HandleShowAddUser(const base::ListValue* args) {
   if (args)
     args->GetString(0, &email);
   gaia_screen_handler_->PopulateEmail(email);
+  if (!email.empty())
+    SendReauthReason(email);
   OnShowAddUser();
 }
 
@@ -1192,7 +1199,10 @@ void SigninScreenHandler::HandleLoginVisible(const std::string& source) {
     OnPreferencesChanged();
 }
 
-void SigninScreenHandler::HandleCancelPasswordChangedFlow() {
+void SigninScreenHandler::HandleCancelPasswordChangedFlow(
+    const std::string& user_id) {
+  if (!user_id.empty())
+    RecordReauthReason(user_id, ReauthReason::PASSWORD_UPDATE_SKIPPED);
   gaia_screen_handler_->StartClearingCookies(
       base::Bind(&SigninScreenHandler::CancelPasswordChangedFlowInternal,
                  weak_factory_.GetWeakPtr()));
@@ -1317,6 +1327,20 @@ void SigninScreenHandler::HandleLogRemoveUserWarningShown() {
       ProfileMetrics::DELETE_PROFILE_USER_MANAGER_SHOW_WARNING);
 }
 
+void SigninScreenHandler::HandleFirstIncorrectPasswordAttempt(
+    const std::string& email) {
+  // TODO(ginkage): Fix this case once crbug.com/469987 is ready.
+  /*
+    if (user_manager::UserManager::Get()->FindUsingSAML(email))
+      RecordReauthReason(email, ReauthReason::INCORRECT_SAML_PASSWORD_ENTERED);
+  */
+}
+
+void SigninScreenHandler::HandleMaxIncorrectPasswordAttempts(
+    const std::string& email) {
+  RecordReauthReason(email, ReauthReason::INCORRECT_PASSWORD_ENTERED);
+}
+
 bool SigninScreenHandler::AllWhitelistedUsersPresent() {
   CrosSettings* cros_settings = CrosSettings::Get();
   bool allow_new_user = false;