Allow lookup of videodecoder service to fix HW video decoding on macOS 10.13

Tha macOS sandbox has apparently changed in 10.13.  If we don't allow
lookup of the global Mach service com.apple.coremedia.videodecoder,
VTDecompressionSessionCreate() fails with
kVTVideoDecoderNotAvailableNowErr for some videos.

Bug: 767037
Change-Id: I4fee235d3808a504d57660976ef96b3a0a0f54d7
Reviewed-on: https://chromium-review.googlesource.com/677290
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#503747}
1 file changed