PaymentHandler: Initial implementation for PaymentInstruments.

third_party/WebKit/Source/modules/payments/PaymentInstrument.idl

Index: third_party/WebKit/Source/modules/payments/PaymentInstrument.idl
diff --git a/third_party/WebKit/Source/modules/payments/PaymentInstrument.idl b/third_party/WebKit/Source/modules/payments/PaymentInstrument.idl
new file mode 100644
index 0000000000000000000000000000000000000000..5132410e47268220123ebc64ea922e7d3ea21c66
--- /dev/null
+++ b/third_party/WebKit/Source/modules/payments/PaymentInstrument.idl
@@ -0,0 +1,12 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// https://w3c.github.io/webpayments-payment-apps-api/#payment-instrument
+
+dictionary PaymentInstrument {

[please use gerrit instead, 2017/03/28 16:33:29]

Let's put the RuntimeEnabled=PaymentApp in here just for clarity.

[zino, 2017/03/29 15:51:23]

Is it possible? I didn't find any case of use.
As far as I know, the dictionary only needs the flag for member attributes.

Related CL link:
  https://codereview.chromium.org/1412433004

+    required DOMString name;
+    // TODO(zino): sequence<ImageObject> icons;

[please use gerrit instead, 2017/03/28 16:33:29]

Why comment this out?

[zino, 2017/03/29 15:51:23]

The icons is not be clear yet. There is no ImageObject in IDL level.
Instead we should use string or define another interface.
Related link:
 - https://github.com/w3c/webpayments-payment-apps-api/issues/69

I'll leave a comment in more detail.

+    sequence<DOMString> enabledMethods;
+    object capabilities;
+};