ChromeOS: user whitelist check should happen before entering password.

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

 // Copyright 2013 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/ui/webui/chromeos/login/gaia_screen_handler.h"
 
 #include "base/bind.h"
 #include "base/guid.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
@@ skipping 412 matching lines @@
   AddCallback("usingSAMLAPI", &GaiaScreenHandler::HandleUsingSAMLAPI);
   AddCallback("scrapedPasswordCount",
               &GaiaScreenHandler::HandleScrapedPasswordCount);
   AddCallback("scrapedPasswordVerificationFailed",
               &GaiaScreenHandler::HandleScrapedPasswordVerificationFailed);
   AddCallback("loginWebuiReady", &GaiaScreenHandler::HandleGaiaUIReady);
   AddCallback("toggleWebviewSignin",
               &GaiaScreenHandler::HandleToggleWebviewSignin);
   AddCallback("toggleEasyBootstrap",
               &GaiaScreenHandler::HandleToggleEasyBootstrap);
+  AddCallback("identifierEntered", &GaiaScreenHandler::HandleIdentifierEntered);
+}
+
+void GaiaScreenHandler::HandleIdentifierEntered(
+    const std::string& account_identifier) {
+  if (!Delegate()->IsUserWhitelisted(account_identifier))
+    ShowWhitelistCheckFailedError();
 }
 
 void GaiaScreenHandler::HandleFrameLoadingCompleted(int status) {
   const net::Error frame_error = static_cast<net::Error>(-status);
   if (frame_error == net::ERR_ABORTED) {
     LOG(WARNING) << "Ignoring Gaia frame error: " << frame_error;
     return;
   }
   frame_error_ = frame_error;
   if (frame_error == net::OK) {
@@ skipping 502 matching lines @@
 SigninScreenHandlerDelegate* GaiaScreenHandler::Delegate() {
   DCHECK(signin_screen_handler_);
   return signin_screen_handler_->delegate_;
 }
 
 void GaiaScreenHandler::SetSigninScreenHandler(SigninScreenHandler* handler) {
   signin_screen_handler_ = handler;
 }
 
 }  // namespace chromeos