GitLab

CreateAcceleratedVideoEncoder() returns a nullptr on failure. We need
to check |media_encoder_| before initializing it.

Bug: 1123080
Change-Id: I244c29f85602097a8348c037a0a2a3555c1f12f9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2382012
Auto-Submit: Thomas Guilbert <tguilbert@chromium.org>
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#802813}