TBR=braveyao@chromium.org
Bug: libyuv:750
Test: builds and runs and passes more tidy tests
Change-Id: I1400a915ee5734c38d19dab9cf1f210ca43d17fc
Reviewed-on: https://chromium-review.googlesource.com/905810Reviewed-by: Frank Barchard <fbarchard@chromium.org>