ChromeOS: user whitelist check should happen before entering password.

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

Index: chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
diff --git a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
index 31df3b670526c70c76ccc11eb32d5ab000c790ab..dda3c875450289cbdc98a4f6791acabeff9f3ee1 100644
--- a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
+++ b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
@@ -193,6 +193,9 @@ class SigninScreenHandlerDelegate {
   // Runs an OAuth token validation check for user.
   virtual void CheckUserStatus(const std::string& user_id) = 0;
 
+  // Returns true if user is allowed to log in by domain policy.
+  virtual bool IsUserWhitelisted(const std::string& user_id) = 0;
+
  protected:
   virtual ~SigninScreenHandlerDelegate() {}
 };