BUG=libyuv:685, chromium:692600
TEST=gn gen out\Release "--args=is_debug=false"
ninja -C out\Release
out\release\libyuv_unittest --libyuv_width=1280 --libyuv_height=720 --libyuv_repeat=999 --libyuv_flags=-1 --libyuv_cpu_info=-1 --gtest_filter=*ARGBToI420_Opt

Change-Id: I12ec09ae2e9bc448252aa46b137f52916403865d
Reviewed-on: https://chromium-review.googlesource.com/446667Reviewed-by: Frank Barchard <fbarchard@google.com>
Commit-Queue: Frank Barchard <fbarchard@google.com>