Close tray bubble before disabling UI for sign-in.
During Chrome OS sign-in we temperoraly block the UI, to prevent user
from interracting with UI elements, particullary with the system tray
menu. However, if system tray menu is opened before disabling the UI,
it remains opened after. Fixed this by closing the menu together with
disabling the UI.
BUG=497080
TEST=manually
Review URL: https://codereview.chromium.org/1187593006
Cr-Commit-Position: refs/heads/master@{#335133}
Review URL: https://codereview.chromium.org/1194053003
Cr-Commit-Position: refs/heads/master@{#335562}
1 file changed
