[ChromeOS] Reset Gaia UI and show error if needed.

chrome/browser/chromeos/login/webui_login_view.cc

Index: chrome/browser/chromeos/login/webui_login_view.cc
diff --git a/chrome/browser/chromeos/login/webui_login_view.cc b/chrome/browser/chromeos/login/webui_login_view.cc
index 5091cb15285b2938ba7f0d64043f3e038707228c..7575c9d21f1fb0b16768345cebf224843d6c3f44 100644
--- a/chrome/browser/chromeos/login/webui_login_view.cc
+++ b/chrome/browser/chromeos/login/webui_login_view.cc
@@ -235,6 +235,12 @@ bool WebUILoginView::TakeFocus(bool reverse) {
 void WebUILoginView::HandleKeyboardEvent(const NativeWebKeyboardEvent& event) {
   unhandled_keyboard_event_handler_.HandleKeyboardEvent(event,
                                                         GetFocusManager());
+
+  // Make sure error bubble is cleared on keyboard event. This is needed
+  // when the focus is inside an iframe.
+  WebUI* web_ui = GetWebUI();
+  if (web_ui)
+    web_ui->CallJavascriptFunction("cr.ui.Oobe.clearErrors");
 }
 
 }  // namespace chromeos