git cl try: clarify where the default set of bots is coming from.
git cl try: clarify where the default set of bots is coming from.

R=sergiyb@chromium.org,dsinclair@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2044663003

primiano/depot_tools,CoherentLabs/depot_tools,CoherentLabs/depot_tools,primiano/depot_tools,primiano/depot_tools