Before:
Failure: expected <true> found <false>

After:
Failure: expected <0.4 +- 0.001> found <0.3>

R=ahaas@chromium.org

Change-Id: I304fd90112cb7131103863813e7b0920be2b5c04
Reviewed-on: https://chromium-review.googlesource.com/456284Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43950}