Support HEVC through EME
Currently we support HEVC demuxing through regular MSE and ffmpeg code
paths. Now we need to add also support for HEVC playback (and
appropriate media mime type and codec support checks) through EME code
path as well.
BUG=
606564
Committed:
https://crrev.com/779123fd5a7c241cfffa34e93c786b0ad96956b0
Cr-Commit-Position: refs/heads/master@{#399964}