commit 36e485aae6fcb3231843941f750df0428bcb401d
author Biao She <bshe@chromium.org> Wed Aug 30 23:52:38 2017
committer Commit Bot <commit-bot@chromium.org> Wed Aug 30 23:52:38 2017
tree 94975c64d0afac429c12577bad167e6baf73d26b
parent db2c080f98ef73f441c11ab9144fd8a337496c68

Add vr feature policy

This CL enables vr feature policy. So that, if you want to disable vr within
your application, you can delivering the following HTTP response header:
Feature-Policy: vr 'none'
If you want to enable vr for all frames(including cross-origin iframes),
delivering this:
Feature-Policy: vr *
If you want to enable vr just for your own origin, delivering this:
Feature-Policy: vr 'self'

To request vr for iframes, you can
<iframe src="https://foo.bar" allow="vr"></iframe> to grant vr to this iframe.

Bug: 666767
Change-Id: I48d7accf8553d6a9ac19d9f41dbbce2ff9934579
Reviewed-on: https://chromium-review.googlesource.com/636663
Reviewed-by: Ian Vollick <vollick@chromium.org>
Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Reviewed-by: Ian Clelland <iclelland@chromium.org>
Commit-Queue: Biao She <bshe@chromium.org>
Cr-Commit-Position: refs/heads/master@{#498674}