ChromeOS: user whitelist check should happen before entering password.

chrome/browser/chromeos/login/existing_user_controller.cc

Index: chrome/browser/chromeos/login/existing_user_controller.cc
diff --git a/chrome/browser/chromeos/login/existing_user_controller.cc b/chrome/browser/chromeos/login/existing_user_controller.cc
index 9866456dd4e0d92c43499d2566ea2e3edf68635e..d3037c88ec6f0d15830f20e3a97ee4b046b05d1b 100644
--- a/chrome/browser/chromeos/login/existing_user_controller.cc
+++ b/chrome/browser/chromeos/login/existing_user_controller.cc
@@ -452,6 +452,14 @@ void ExistingUserController::Signout() {
   NOTREACHED();
 }
 
+bool ExistingUserController::IsUserWhitelisted(const std::string& user_id) {
+  bool wildcard_match = false;
+  if (login_performer_.get())
+    return login_performer_->IsUserWhitelisted(user_id, &wildcard_match);
+
+  return chromeos::CrosSettings::IsWhitelisted(user_id, &wildcard_match);
+}
+
 void ExistingUserController::OnConsumerKioskAutoLaunchCheckCompleted(
     KioskAppManager::ConsumerKioskAutoLaunchStatus status) {
   if (status == KioskAppManager::CONSUMER_KIOSK_AUTO_LAUNCH_CONFIGURABLE)