
In particular, introduce a new way to specify Xcode versions in swarming tasks. BUG=475693 TBR=justincohen@chromium.org Change-Id: I87c2fea4fe17bfddf4e1dfb374f993bfa1bfcd19 Reviewed-on: https://chromium-review.googlesource.com/838412 Commit-Queue: Sergey Berezin <sergeyberezin@chromium.org> Reviewed-by: Sergey Berezin <sergeyberezin@chromium.org> Cr-Commit-Position: refs/heads/master@{#525610}