[Merge M-56] Mark PaymentDetails.error as experimental

[Merge M-56] Mark PaymentDetails.error as experimental

There has not been a request to implement and ship this feature, so it
should be marked as experimental until such request has been sent out
and consequently approved.

BUG=648240
Review-Url: https://codereview.chromium.org/2530713002
Cr-Commit-Position: refs/heads/master@{#434664}
(cherry picked from commit 1f7a87077603d65b6ac7d2cbf6dca8a3bff8ec87)

Committed: https://chromium.googlesource.com/chromium/src/+/2fe37e5f414ecbb0257877d02065733ecc06df39

[please use gerrit instead, 2016-11-28 17:55:21]

Description was changed from

==========
[Merge M-56] Mark PaymentDetails.error as experimental

There has not been a request to implement and ship this feature, so it
should be marked as experimental until such request has been sent out
and consequently approved.

BUG=648240

Review-Url: https://codereview.chromium.org/2530713002
Cr-Commit-Position: refs/heads/master@{#434664}
(cherry picked from commit 1f7a87077603d65b6ac7d2cbf6dca8a3bff8ec87)
==========

to

==========
[Merge M-56] Mark PaymentDetails.error as experimental

There has not been a request to implement and ship this feature, so it
should be marked as experimental until such request has been sent out
and consequently approved.

BUG=648240

Review-Url: https://codereview.chromium.org/2530713002
Cr-Commit-Position: refs/heads/master@{#434664}
(cherry picked from commit 1f7a87077603d65b6ac7d2cbf6dca8a3bff8ec87)

Committed:
https://chromium.googlesource.com/chromium/src/+/2fe37e5f414ecbb0257877d02065...
==========

[please use gerrit instead, 2016-11-28 17:55:22]

Committed patchset #1 (id:1) manually as
2fe37e5f414ecbb0257877d02065733ecc06df39.