The first "sharding" technique we will try is just by test config
(e.g. 8888, gles, etc). Thus, for backwards compatibility,
the default "shard" is All, as in all configs
Bug: skia:
NOTRY=true
Change-Id: Ia02362477a5d97f8f74d688b5f0c4f45fc129375
Reviewed-on: https://skia-review.googlesource.com/59563
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Eric Boren <borenet@google.com>