Implemented screen notifying users about malformed HWID.

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 cd0b3b50f854a30a6757e9831dff5f3ef7e8259a..21e862d3f162d5f7bfcacc35a6179a310e66bc9c 100644
--- a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
@@ -25,6 +25,7 @@
 #include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_settings.h"
 #include "chrome/browser/chromeos/login/base_login_display_host.h"
 #include "chrome/browser/chromeos/login/error_screen_actor.h"
+#include "chrome/browser/chromeos/login/hwid_checker.h"
 #include "chrome/browser/chromeos/login/screen_locker.h"
 #include "chrome/browser/chromeos/login/user.h"
 #include "chrome/browser/chromeos/login/webui_login_display.h"
@@ -1268,6 +1269,13 @@ void SigninScreenHandler::HandleAccountPickerReady(
     const base::ListValue* args) {
   LOG(INFO) << "Login WebUI >> AccountPickerReady";
 
+  if (delegate_ && !ScreenLocker::default_screen_locker() &&
+      !chromeos::IsMachineHWIDCorrect() &&
+      !oobe_ui_) {
+    delegate_->ShowWrongHWIDScreen();
+    return;
+  }
+
   PrefService* prefs = g_browser_process->local_state();
   if (prefs->GetBoolean(prefs::kFactoryResetRequested)) {
     prefs->SetBoolean(prefs::kFactoryResetRequested, false);