GitLab

D3D11VideoDecoder is crashing periodically with a null |decode_cb_|.
It's unclear how this is happening.

This CL checks for the null callback and skips it, to prevent the
crash.  It also adds some debugging that hopefully will tell us
where the null callback is coming from:

 - Provided to Decode()
 - Popped off the buffer queue in DoDecode
 - Cleared elsewhere

Bug: 1012464
Change-Id: Idc4eb1842aa98989b9ceea30ed5aa769f0a63ce6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1954735Reviewed-by: Ted Meyer <tmathmeyer@chromium.org>
Commit-Queue: Frank Liberato <liberato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#722652}