[Fuchsia] Re-enable Video Decoder.

Updates video decoder for Fuchsia codec API change.

Change-Id: I642810b3f923fd24f8ecfc039388601261692036
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1497357
Commit-Queue: Payton Turnage <turnage@google.com>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Dan Sanders <sandersd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#641389}
3 files changed