Move the suborigin experiment to test-only mode.

Move the suborigin experiment to test-only mode.

We're seeing crashes in the wild for folks with the experimental features
flag turned on, as our suborigins implementation breaks origins that
natively use an underscore in their DNS name (renderer crash with
bad_message_reason 114 (RFH_INVALID_ORIGIN_ON_COMMIT)).

This patch moves suborigins behind the test flag, so that it isn't
enabled for users who have opted into experimental web platform
features. We expect to re-enable it for those users once we've reworked
serialization in https://github.com/w3c/webappsec-suborigins/issues/38

BUG=617588
TBR=jww@chromium.org

Review-Url: https://codereview.chromium.org/2094873004
Cr-Commit-Position: refs/heads/master@{#401840}
(cherry picked from commit 66ab9f9074c3d1082a7ab1062914fece3810c104)

Committed: https://chromium.googlesource.com/chromium/src/+/307cf74bd38a7bb5482414061ada0da713f72a2f

[Mike West, 2016-06-27 11:27:46]

Description was changed from

==========
Move the suborigin experiment to test-only mode.

We're seeing crashes in the wild for folks with the experimental features
flag turned on, as our suborigins implementation breaks origins that
natively use an underscore in their DNS name (renderer crash with
bad_message_reason 114 (RFH_INVALID_ORIGIN_ON_COMMIT)).

This patch moves suborigins behind the test flag, so that it isn't
enabled for users who have opted into experimental web platform
features. We expect to re-enable it for those users once we've reworked
serialization in https://github.com/w3c/webappsec-suborigins/issues/38

BUG=617588
TBR=jww@chromium.org

Review-Url: https://codereview.chromium.org/2094873004
Cr-Commit-Position: refs/heads/master@{#401840}
(cherry picked from commit 66ab9f9074c3d1082a7ab1062914fece3810c104)
==========

to

==========
Move the suborigin experiment to test-only mode.

We're seeing crashes in the wild for folks with the experimental features
flag turned on, as our suborigins implementation breaks origins that
natively use an underscore in their DNS name (renderer crash with
bad_message_reason 114 (RFH_INVALID_ORIGIN_ON_COMMIT)).

This patch moves suborigins behind the test flag, so that it isn't
enabled for users who have opted into experimental web platform
features. We expect to re-enable it for those users once we've reworked
serialization in https://github.com/w3c/webappsec-suborigins/issues/38

BUG=617588
TBR=jww@chromium.org

Review-Url: https://codereview.chromium.org/2094873004
Cr-Commit-Position: refs/heads/master@{#401840}
(cherry picked from commit 66ab9f9074c3d1082a7ab1062914fece3810c104)

Committed:
https://chromium.googlesource.com/chromium/src/+/307cf74bd38a7bb5482414061ada...
==========

[Mike West, 2016-06-27 11:27:48]

Committed patchset #1 (id:1) manually as
307cf74bd38a7bb5482414061ada0da713f72a2f.