GitLab

Fixed ios13-beta build by adding shards:1 because
test_runner does not support multi-sharding command
https://chromium-swarm.appspot.com/task?id=46388c76bc6f6410

Change-Id: I426b3ecc8790508656b31ac9f6fbf7d54245ff92
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1715565Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Mike Dougherty <michaeldo@chromium.org>
Commit-Queue: Maksym Onufriienko <monufriienko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#680174}