[Merge M-53] NotSupportedError for payment apps without instruments.

[Merge M-53] NotSupportedError for payment apps without instruments.

If the merchant website requests only a payment app that happens to not
have any payment instruments and no ability to add an instrument from
within PaymentRequest UI, then reject the show() promise with
NotSupportedError.

BUG=628685
Review-Url: https://codereview.chromium.org/2159513002
Cr-Commit-Position: refs/heads/master@{#406558}
(cherry picked from commit 036c952c9a98ce9b25d7020fe865727b172d501a)

Committed: https://chromium.googlesource.com/chromium/src/+/23b5a62b04e4594c310a80c9f0646cd87918101e

[please use gerrit instead, 2016-07-22 16:27:50]

Description was changed from

==========
[Merge M-53] NotSupportedError for payment apps without instruments.

If the merchant website requests only a payment app that happens to not
have any payment instruments and no ability to add an instrument from
within PaymentRequest UI, then reject the show() promise with
NotSupportedError.

BUG=628685

Review-Url: https://codereview.chromium.org/2159513002
Cr-Commit-Position: refs/heads/master@{#406558}
(cherry picked from commit 036c952c9a98ce9b25d7020fe865727b172d501a)
==========

to

==========
[Merge M-53] NotSupportedError for payment apps without instruments.

If the merchant website requests only a payment app that happens to not
have any payment instruments and no ability to add an instrument from
within PaymentRequest UI, then reject the show() promise with
NotSupportedError.

BUG=628685

Review-Url: https://codereview.chromium.org/2159513002
Cr-Commit-Position: refs/heads/master@{#406558}
(cherry picked from commit 036c952c9a98ce9b25d7020fe865727b172d501a)

Committed:
https://chromium.googlesource.com/chromium/src/+/23b5a62b04e4594c310a80c9f064...
==========

[please use gerrit instead, 2016-07-22 16:27:52]

Committed patchset #1 (id:1) manually as
23b5a62b04e4594c310a80c9f0646cd87918101e.