GitLab

    - Russian phonetic (YaZHert) keyboard
    - Russian phonetic (AATSEEL) keyboard
    - Maltese keyboard

Also support Irish keyboard as login keyboard.

BUG=173149
TEST=Verified on linux_chromeos.

Review URL: https://codereview.chromium.org/643853002

Cr-Commit-Position: refs/heads/master@{#300272}