Update experimental builders at beginning of UpdateSlaveStatus
Updating experimental builders in the middle of UpdateSlaveStatus will
lead different process getting status from different expected builders.
BUG=chromium:758247
TEST=run_tests
Change-Id: I8029f07b15c6337b9b8edb77686cda8aaff9821e
Reviewed-on: https://chromium-review.googlesource.com/629496
Commit-Ready: Ningning Xia <nxia@chromium.org>
Tested-by: Ningning Xia <nxia@chromium.org>
Reviewed-by: Ningning Xia <nxia@chromium.org>
2 files changed
