GitLab

On click, the group is set as active (with blue colour) and
the emoji picker is scrolled to that group. Currently, the
active group binding is only one way (i.e. scrolling the
list of emoji manually will not change the active group button).

Bug: 1152237
Change-Id: I9e847c541ceb3b2f32b9649dce2cd8bed30e7994
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2596733Reviewed-by: John Palmer <jopalmer@chromium.org>
Reviewed-by: Keith Lee <keithlee@chromium.org>
Commit-Queue: Kenton Lam <kentonlam@google.com>
Cr-Commit-Position: refs/heads/master@{#842285}