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This reverts commit 53ccc526.

Reason for revert: Now has diagnostic uploading, so we'll at least be able
to tell why it fails if it's still failing. I've also tried tweaking
the sound config on the machine.

Bug: chromium:677256
Change-Id: I96cdf15eff0b9d1e09053560ac5e4c518abc5caa
Reviewed-on: https://chromium-review.googlesource.com/826942Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Patrik Höglund <phoglund@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524044}