First known failing builder:

https://uberchromegw.corp.google.com/i/chromeos.chrome/builders/peach_pit-tot-chrome-pfq-informational/builds/1539

Failure messages from builder:

video_ChromeHWDecodeUsed                FAIL: Unhandled unicode: Unhandled DevtoolsTargetCrashException: Devtools target crashed
video_VideoSanity                       FAIL: Unhandled unicode: Unhandled DevtoolsTargetCrashException: Devtools target crashed
video_ChromeHWDecodeUsed                ERROR: Media.GpuVideoDecoderInitializeStatus not loaded or histogram bucket not found or histogram bucket found at < 100%
video_ChromeHWDecodeUsed                FAIL: Unhandled unicode: Unhandled DevtoolsTargetCrashException: Devtools target crashed
video_VideoSanity                       FAIL: Unhandled unicode: Unhandled DevtoolsTargetCrashException: Devtools target crashed
video_ChromeRTCHWDecodeUsed             FAIL: Unhandled DevToolsClientConnectionError: [Errno 104] Connection reset by peer
video_ChromeHWDecodeUsed                ERROR: Media.GpuVideoDecoderInitializeStatus not loaded or histogram bucket not found or histogram bucket found at < 100%


Presumably these all have the same root cause.