[code coverage] Use two shards to run base_unittests.
This is to validate that the merge logic is correct before adding larger
targets.
TBR=liaoyuke,stgao,jbudorick
Change-Id: Ia7c53c8f1f9731b143aafff6aedccc1ac6cf5413
Reviewed-on: https://chromium-review.googlesource.com/c/1291991
Reviewed-by: Roberto Carrillo <robertocn@chromium.org>
Reviewed-by: Shuotao Gao <stgao@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Yuke Liao <liaoyuke@chromium.org>
Commit-Queue: Roberto Carrillo <robertocn@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#601255}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 9ad30be15337b239c583359120e4f7d6b438e3b32 files changed
