Revision range first seen: as far as the bot's history goes, oldest available failure: https://build.chromium.org/p/chromium.perf/builders/Mac%2010.10%20Perf%20%284%29/builds/3082
Link to failing step log: https://build.chromium.org/p/chromium.perf/builders/Mac%2010.10%20Perf%20%284%29/builds/3279/steps/media.tough_video_cases_extra.reference/logs/stdio

The failures are due to native crashes on video.html?src=tulip2.ogv:

2016-03-18 04:30:07.403 Google Chrome[8175:19283] NSWindow warning: adding an unknown subview: <FullSizeContentView: 0x7fbc9b103ff0>
2016-03-18 04:30:07.404 Google Chrome[8175:19283] Call stack:
(
  0   AppKit                              0x00007fff8bf2b54d -[NSThemeFrame addSubview:] + 107
  1   AppKit                              0x00007fff8bf2b03f -[NSView addSubview:positioned:relativeTo:] + 208
  2   Google Chrome Framework             0x0000000110674723 ChromeMain + 51699443
  3   Google Chrome Framework             0x000000011067352c ChromeMain + 51694844
  4   Google Chrome Framework             0x00000001106dd3c1 ChromeMain + 52128657
  5   Google Chrome Framework             0x0000000110631ecc ChromeMain + 51426972
  6   Google Chrome Framework             0x000000011063c5c2 ChromeMain + 51469714
  7   Google Chrome Framework             0x0000000110741ebc ChromeMain + 52541068
  8   Google Chrome Framework             0x000000011077a96f ChromeMain + 52773183
  9   Google Chrome Framework             0x0000000110779d98 ChromeMain + 52770152
  10  Google Chrome Framework             0x0000000110779870 ChromeMain + 52768832
  11  Google Chrome Framework             0x0000000110778cf0 ChromeMain + 52765888
  12  Google Chrome Framework             0x00000001107788ff ChromeMain + 52764879
  13  Google Chrome Framework             0x00000001107767d2 ChromeMain + 52756386
  14  Google Chrome Framework             0x00000001107765a7 ChromeMain + 52755831
  15  Google Chrome Framework             0x00000001107759c1 ChromeMain + 52752785
  16  Google Chrome Framework             0x000000010d5c41d1 ChromeMain + 645537
  17  Google Chrome Framework             0x000000010d5c30ca ChromeMain + 641178
  18  Google Chrome Framework             0x00000001109ce1ea ChromeMain + 55212474
  19  Google Chrome Framework             0x0000000110c78d27 ChromeMain + 58008823
  20  Google Chrome Framework             0x00000001109cc801 ChromeMain + 55205841
  21  Google Chrome Framework             0x00000001109d09a0 ChromeMain + 55222640
  22  Google Chrome Framework             0x00000001109c9df5 ChromeMain + 55195077
  23  Google Chrome Framework             0x000000010da6099c ChromeMain + 5480812
  24  Google Chrome Framework             0x000000010da5ff06 ChromeMain + 5478102
  25  Google Chrome Framework             0x000000010d526872 ChromeMain + 66
  26  Google Chrome                       0x000000010d4bfd42 main + 530
  27  Google Chrome                       0x000000010d4bfb24 Google Chrome + 2852
)

I'm not disabling the benchmark because it's currently failing less than one in five times (https://chromium.googlesource.com/chromium/src/+/master/tools/perf/docs/perf_bot_sheriffing.md#testfailures), namely 3/20 and 15/200 most recent builds. I'm assigning it to the test owner instead. If the test is disabled, please downgrade to Pri-2.