Examples:

https://build.chromium.org/p/chromium.infra/builders/infra-continuous-precise-64/builds/1903

https://build.chromium.org/p/chromium.infra/builders/infra-continuous-mac-10.9-64/builds/1753

--------------
Failures:

  * /b/build/slave/infra-continuous/build/infra/go/src/infra/monitoring/proxy/main_test.go 
  Line 87:
  Error during mock: No registered mock matching send(context.Background.WithValue(0, (func() retry.Iterator)(0x9a200)).WithCancel.WithValue(1, logging.Fields{"worker":8}).WithValue(1, logging.Fields{"messageID":"msg-3", "worker":8, "size":1}), [3]).
  Error during mock: Result count (0) differs from bound args (1).
  Unused mock was registered: send(&{}, [3])


1125 total assertions

--- FAIL: TestMain (0.04s)
FAIL