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TBR=xiyuan@chromium.org

TEST=Manually and unit_tests extended
BUG=841939

Change-Id: I6cdb770374d60c4e56539b1fa1d460b011e6bf21
Reviewed-on: https://chromium-review.googlesource.com/1134509
Commit-Queue: Yury Khmel <khmel@google.com>
Reviewed-by: Michael Wasserman <msw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#574725}