GitLab

Remove the submit button on the pin pad shown on the login/lock
screen. Change LoginPinView construction to only show the submit
button on the pinpad when the |on_submit| callback is valid.

Verified locally that it removes the memory leak LoginPinView from:
https://crbug.com/1099306#c1

Bug: 1075994, 1101326, 1099306
Change-Id: Ib7de615c9f5c6faec168e1205e44a981f739f9a3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2339524
Commit-Queue: Renato Silva <rrsilva@google.com>
Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Auto-Submit: Renato Silva <rrsilva@google.com>
Cr-Commit-Position: refs/heads/master@{#795437}