Filed by sheriff-o-matic@appspot.gserviceaccount.com on behalf of dmurph@google.com

telemetry_perf_unittests failing on chromium.linux/linux-xenial-rel

Builders failed on: 
- linux-xenial-rel: 
  https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/linux-xenial-rel

It looks like this is a brand new bot? It's failing with this log:

Additional test environment:
    CHROME_DEVEL_SANDBOX=/opt/chromium/chrome_sandbox
    CHROME_HEADLESS=1
    LANG=en_US.UTF-8
Command: /b/swarming/w/ir/.swarming_module_cache/vpython/09eff0/bin/python ../../testing/scripts/run_telemetry_as_googletest.py ../../tools/perf/run_tests -v --isolated-script-test-output=/b/swarming/w/io6GM_gz/output.json --isolated-script-test-perf-output=/b/swarming/w/io6GM_gz/perftest-output.json

INFO:root:BattOr power monitor is not connected.
INFO:py_utils.cloud_storage:Downloading gs://chromium-telemetry/binary_dependencies/adb_8bd43e3930f6eec643d5dc64cab9e5bb4ddf4909 to /b/swarming/w/ir/third_party/catapult/devil/bin/deps/linux2/x86_64/bin/adb
INFO:devil.utils.timeout_retry:condition '<lambda>' not met
INFO:devil.utils.timeout_retry:condition '<lambda>' met
INFO:devil.utils.cmd_helper:[host]> /b/swarming/w/ir/third_party/catapult/devil/bin/deps/linux2/x86_64/bin/adb devices
INFO:devil.utils.cmd_helper:[host]> /b/swarming/w/ir/third_party/catapult/devil/bin/deps/linux2/x86_64/bin/adb devices
INFO:devil.utils.cmd_helper:[host]> /b/swarming/w/ir/third_party/catapult/devil/bin/deps/linux2/x86_64/bin/adb kill-server
WARNING:root:Chrome build location for linux_x86_64 not found. Browser will be run without Flash.
WARNING:root:Found (release), but you do not have a DISPLAY environment set.
Usage: run_tests.py [test_name ...] [<options>]

run_tests.py: error: No browser found of type any. Cannot run tests.
Re-run with --browser=list to see available browser types.

I'm guessing perf doesn't know how to handle this bot environment?