[WebPayments] Order Summary a11y

This CL corrects issues with screen reader accessibility on the
order summary screen. Specifically:

- Does not read the "preview" text (e.g., "123 Fake St. and 1 other...")
  as it is confusingly similar to the selected state.

- Adds accessible content when a payment method has been selected.

BUG=733684
Review-Url: https://codereview.chromium.org/2956473002
Cr-Commit-Position: refs/heads/master@{#481907}
Committed: https://chromium.googlesource.com/chromium/src/+/69ad872ecf7a6d4bfebf69a4c18544146ef85433

[tmartino, 2017-06-22 19:14:32]

The CQ bit was checked by tmartino@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-06-22 19:14:58]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[tmartino, 2017-06-22 19:17:16]

Description was changed from

==========
Correcting accessible content

BUG=
==========

to

==========
This CL corrects issues with screen reader accessibility on the
order summary screen. Specifically:

- Does not read the "preview" text (e.g., "123 Fake St. and 1 other...")
  as it is confusingly similar to the selected state.

- Adds accessible content when a payment method has been selected.

BUG=733684
==========

[tmartino, 2017-06-22 19:37:03]

tmartino@chromium.org changed reviewers:
+ anthonyvd@chromium.org

[commit-bot: I haz the power, 2017-06-22 20:19:37]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-06-22 20:19:38]

Dry run: This issue passed the CQ dry run.

[anthonyvd, 2017-06-23 14:55:16]

lgtm

[tmartino, 2017-06-23 15:54:51]

The CQ bit was checked by tmartino@chromium.org

[commit-bot: I haz the power, 2017-06-23 15:55:04]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-06-23 15:58:50]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1498233291992440, "parent_rev":
"159a49c29c076f9c5583c4607ca6965cd5ec4722", "commit_rev":
"69ad872ecf7a6d4bfebf69a4c18544146ef85433"}

[commit-bot: I haz the power, 2017-06-23 15:59:01]

Description was changed from

==========
This CL corrects issues with screen reader accessibility on the
order summary screen. Specifically:

- Does not read the "preview" text (e.g., "123 Fake St. and 1 other...")
  as it is confusingly similar to the selected state.

- Adds accessible content when a payment method has been selected.

BUG=733684
==========

to

==========
This CL corrects issues with screen reader accessibility on the
order summary screen. Specifically:

- Does not read the "preview" text (e.g., "123 Fake St. and 1 other...")
  as it is confusingly similar to the selected state.

- Adds accessible content when a payment method has been selected.

BUG=733684

Review-Url: https://codereview.chromium.org/2956473002
Cr-Commit-Position: refs/heads/master@{#481907}
Committed:
https://chromium.googlesource.com/chromium/src/+/69ad872ecf7a6d4bfebf69a4c185...
==========

[commit-bot: I haz the power, 2017-06-23 15:59:03]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/69ad872ecf7a6d4bfebf69a4c185...