ICU is needed to parse unicode property names.

NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true

TBR=mths@chromium.org

Bug: chromium:793588
Change-Id: I7a4cd2885713c490fbc53867079fba69a26cba75
Reviewed-on: https://chromium-review.googlesource.com/831515
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50147}