eglDestroyContext has been observed to deadlock with other GL threads unless the GL program is detached beforehand. TBR=sakal NO_TRY=TRUE Bug: b/120481228 Change-Id: Ie256e745828997b6fee0d62e681f5ef953aa0fe7 Reviewed-on: https://webrtc-review.googlesource.com/c/114164 Reviewed-by: Magnus Jedvert <magjed@webrtc.org> Commit-Queue: Magnus Jedvert <magjed@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25999}