Board: daisy_skate
Build: 11021.48.0
Logs: http://ubercautotest.corp.google.com/tko/retrieve_logs.cgi?job=/results/248347472-chromeos-test/chromeos4-row9-rack5-host1

Seems to be quite flaky and present on both R70 and R71 as per the dashboard:

https://cros-goldeneye.corp.google.com/chromeos/healthmonitoring/testDetails?testName=video_ChromeRTCHWDecodeUsed&suite=&daysBack=30&board=daisy_skate&architecture=&boardFamily=&buildConfig=&reason=&version=&milestone=&dut=&token=AOheusMKNlJV86rFEn8kevT25PMY%3A1539668071995

From the end of the test log:

10/14 04:28:50.860 DEBUG|              test:0381| Test failed due to Expect Media.RTCVideoDecoderInitDecodeSucces has 1. Histogram: {}. Exception log follows the after_iteration_hooks.
10/14 04:28:50.862 DEBUG|              test:0386| Starting after_iteration_hooks for video_ChromeRTCHWDecodeUsed.vp8
10/14 04:28:50.864 DEBUG|      base_sysinfo:0124| Loggable saves logs to /usr/local/autotest/results/default/video_ChromeRTCHWDecodeUsed.vp8/sysinfo/iteration.1/interrupts.after
10/14 04:28:50.865 DEBUG|             utils:0219| Running 'mkdir -p /usr/local/autotest/results/default/video_ChromeRTCHWDecodeUsed.vp8/sysinfo/iteration.1/var/spool'
10/14 04:28:50.866 DEBUG|      global_hooks:0056| 'mkdir -p /usr/local/autotest/results/default/video_ChromeRTCHWDecodeUsed.vp8/sysinfo/iteration.1/var/spool'
10/14 04:28:50.908 DEBUG|             utils:0219| Running 'rsync --no-perms --chmod=ugo+r -a --safe-links --exclude=/crash/**autoserv* --exclude=/crash/*.core /var/spool/crash /usr/local/autotest/results/default/video_ChromeRTCHWDecodeUsed.vp8/sysinfo/iteration.1/var/spool'
10/14 04:28:50.911 DEBUG|      global_hooks:0056| 'rsync --no-perms --chmod=ugo+r -a --safe-links --exclude=/crash/**autoserv* --exclude=/crash/*.core /var/spool/crash /usr/local/autotest/results/default/video_ChromeRTCHWDecodeUsed.vp8/sysinfo/iteration.1/var/spool'
10/14 04:28:50.958 DEBUG|             utils:0219| Running 'rm -rf /var/spool/crash/*'
10/14 04:28:50.959 DEBUG|      global_hooks:0056| 'rm -rf /var/spool/crash/*'
10/14 04:28:50.999 DEBUG|      base_sysinfo:0124| Loggable saves logs to /usr/local/autotest/results/default/video_ChromeRTCHWDecodeUsed.vp8/sysinfo/iteration.1/meminfo.after
10/14 04:28:51.001 DEBUG|      base_sysinfo:0124| Loggable saves logs to /usr/local/autotest/results/default/video_ChromeRTCHWDecodeUsed.vp8/sysinfo/iteration.1/slabinfo.after
10/14 04:28:51.002 DEBUG|      base_sysinfo:0124| Loggable saves logs to /usr/local/autotest/results/default/video_ChromeRTCHWDecodeUsed.vp8/sysinfo/iteration.1/schedstat.after
10/14 04:28:51.003 DEBUG|             utils:0219| Running 'logger "autotest finished iteration /usr/local/autotest/results/default/video_ChromeRTCHWDecodeUsed.vp8/sysinfo/iteration.1"'
10/14 04:28:51.004 DEBUG|      global_hooks:0056| 'logger "autotest finished iteration /usr/local/autotest/results/default/video_ChromeRTCHWDecodeUsed.vp8/sysinfo/iteration.1"'
10/14 04:28:51.025 DEBUG|              test:0391| after_iteration_hooks completed
10/14 04:28:51.026 WARNI|              test:0606| The test failed with the following exception
Traceback (most recent call last):
  File "/usr/local/autotest/common_lib/test.py", line 600, in _exec
    _call_test_function(self.execute, *p_args, **p_dargs)
  File "/usr/local/autotest/common_lib/test.py", line 800, in _call_test_function
    return func(*args, **dargs)
  File "/usr/local/autotest/common_lib/test.py", line 464, in execute
    postprocess_profiled_run, args, dargs)
  File "/usr/local/autotest/common_lib/test.py", line 371, in _call_run_once
    self.run_once(*args, **dargs)
  File "/usr/local/autotest/cros/video/helper_logger.py", line 82, in call
    return func(*args, **kwargs)
  File "/usr/local/autotest/tests/video_ChromeRTCHWDecodeUsed/video_ChromeRTCHWDecodeUsed.py", line 91, in run_once
    histogram_differ, histogram_bucket_val, histogram_bucket_val)
  File "/usr/local/autotest/cros/video/histogram_verifier.py", line 197, in expect_sole_bucket
    (histogram_name, bucket_name, histogram))
TestError: Expect Media.RTCVideoDecoderInitDecodeSucces has 1. Histogram: {}
10/14 04:28:51.046 DEBUG|              test:0611| Running cleanup for test.
10/14 04:28:51.048 DEBUG|   logging_manager:0627| Logging subprocess finished
10/14 04:28:51.054 DEBUG|   logging_manager:0627| Logging subprocess finished