Migrate blink::MediaStreamVideoTrack to WTF::Bind

This CL is the 5th and last CL to convert modules/mediastream/
away from base::Bind{Once,Repeating} to their respective Blink/WTF
counterparts.

R=haraken@chromium.org, guidou@chromium.org
CC=blink-reviews-vendor@chromium.org

BUG=923394

Change-Id: I73e2ed0fdba9bf5dc7d13feb0f4aa1cf77386a53
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1597322
Reviewed-by: Hiroshige Hayashizaki <hiroshige@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Antonio Gomes <tonikitoo@igalia.com>
Cr-Commit-Position: refs/heads/master@{#661497}
1 file changed