This CL makes layout tests always run with proprietary codec support.
https://chromium-review.googlesource.com/c/chromium/src/+/807604
This changed the expectations for the following tests to FAIL (either in new or different ways from past failures)
external/wpt/media-source/mediasource-endofstream.html
external/wpt/media-source/mediasource-sourcebuffer-mode-timestamps.html
external/wpt/media-source/mediasource-addsourcebuffer-mode.html
external/wpt/media-source/mediasource-sequencemode-append-buffer.html
This bug tracks making those tests pass and explaining the behavior differences between mp4 and webm (the previously used file type).
Comment 1 by bugdroid1@chromium.org
, Dec 13 2017