TBR=braveyao@chromium.org
Bug: libyuv:750
Test: builds and runs and passes more tidy tests
Change-Id: I316822f7d13b370b88b92a693912e880b21f92c8
Reviewed-on: https://chromium-review.googlesource.com/907371Reviewed-by: Frank Barchard <fbarchard@chromium.org>