Filter out Origin-trial features from Feature Policy JS API

Bug: 939953
Change-Id: I856d141f02b483c5fcb8a506e2ed66308395ea99
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1511828
Commit-Queue: Ian Clelland <iclelland@chromium.org>
Reviewed-by: Luna Lu <loonybear@chromium.org>
Cr-Commit-Position: refs/heads/master@{#639602}
8 files changed