GitLab

This CL implements the functionality of the eye icon. Clicking it
either masks or unmasks the password.

Screenshot in the bug.

Bug: 1114720, 1092444
Change-Id: I1005e61961171caae5b0d0e1ea3c79ef6c3273ee
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2362850
Commit-Queue: Friedrich [CET] <fhorschig@chromium.org>
Reviewed-by: Ioana Pandele <ioanap@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799193}