GitLab

The UI code is moved out of DiceTurnSyncOnHelper into
DiceTurnSyncOnHelper::Delegate, to make the code easier to
test.

Change-Id: I5d4fd9a94a64a05f5c1a63ccd593b3260eea8421
Reviewed-on: https://chromium-review.googlesource.com/870595Reviewed-by: Julian Pastarmov <pastarmovj@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Commit-Queue: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#531922}