GitLab

Implements the ability to select all fonts in the font chooser as a
checkbox. Unselecting the checkbox will cause all selection to
disappear.

Bug: 1159246
Change-Id: Ia3ecda193457a70e8c5b3282362c4439945943ff
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2594510
Commit-Queue: Olivier Yiptong <oyiptong@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#838471}