Re: [infra-tests] [wptrunner] Guard against empty command_queue in BrowserManager.send_message (#5774)

 [View the complete job log.](https://travis-ci.org/w3c/web-platform-tests/jobs/228540975)

# Firefox (nightly channel) #
Testing web-platform-tests at revision b31f26afcda52ea7eee77d19c33b48b782c7ff88
Using browser at version BuildID 20170502100421; SourceStamp 48c0fd9c9ec5d68061ea7b59358874ae8da72572
Starting 10 test iterations
No tests run.

View on GitHub: https://github.com/w3c/web-platform-tests/pull/5774#issuecomment-299060261

Received on Wednesday, 3 May 2017 23:07:17 UTC