cros: Ensure login bubbles are clickable when overlapping with shelf and virtual keyboard

Bug: 884668
Change-Id: I16dd2c5b0156bf1490b57acd4185c1d80d193a67
Reviewed-on: https://chromium-review.googlesource.com/c/1330206
Reviewed-by: Jacob Dufault <[email protected]>
Commit-Queue: Quan Nguyen <[email protected]>
Cr-Commit-Position: refs/heads/master@{#607771}
3 files changed