Add data parameter to payment details modifier.

components/payments/payment_request.mojom

Index: components/payments/payment_request.mojom
diff --git a/components/payments/payment_request.mojom b/components/payments/payment_request.mojom
index 9d95c51a60dcee6f551ccbcab524d8aee2e86216..43524bd3dcaa47755f94fc683f6ef72e577b89c2 100644
--- a/components/payments/payment_request.mojom
+++ b/components/payments/payment_request.mojom
@@ -106,10 +106,34 @@ struct PaymentShippingOption {
   bool selected;
 };
 
-struct PaymentDetailsModifier {
+struct PaymentMethodData {
   array<string> supported_methods;
+
+  // A JSON string built by the renderer from a JavaScript object that the
+  // merchant website provides. The renderer uses
+  // blink::JSONObject::toJSONString() to generate this string. The browser does
+  // not parse the string and passes it as-is directly to payment apps. There's
+  // no one format for this object, so richer types cannot be used. A simple

[palmer, 2016/11/29 00:24:55]

Nit: s/richer/more specific/

[please use gerrit instead, 2016/11/29 16:19:52]

Done.

+  // example:
+  //
+  // {"gateway": "stripe"}
+  string stringified_data;
+
+  // Android Pay specific method data is parsed in the renderer.
+  // https://developers.google.com/web/fundamentals/getting-started/primers/payment-request/android-pay
+  // TODO(rouslan): Stop parsing Android Pay data. http://crbug.com/620173
+  AndroidPayEnvironment environment;
+  string? merchant_name;
+  string? merchant_id;
+  array<AndroidPayCardNetwork> allowed_card_networks;
+  AndroidPayTokenization tokenization_type;
+  array<AndroidPayTokenizationParameter> parameters;
+};
+
+struct PaymentDetailsModifier {
   PaymentItem? total;
   array<PaymentItem> additional_display_items;
+  PaymentMethodData method_data;
 };
 
 struct PaymentDetails {
@@ -157,30 +181,6 @@ struct AndroidPayTokenizationParameter {
   string? value;
 };
 
-struct PaymentMethodData {
-  array<string> supported_methods;
-
-  // A JSON string built by the renderer from a JavaScript object that the
-  // merchant website provides. The renderer uses
-  // blink::JSONObject::toJSONString() to generate this string. The browser does
-  // not parse the string and passes it as-is directly to payment apps. There's
-  // no one format for this object, so richer types cannot be used. A simple
-  // example:
-  //
-  // {"gateway": "stripe"}
-  string stringified_data;
-
-  // Android Pay specific method data is parsed in the renderer.
-  // https://developers.google.com/web/fundamentals/getting-started/primers/payment-request/android-pay
-  // TODO(rouslan): Stop parsing Android Pay data. http://crbug.com/620173
-  AndroidPayEnvironment environment;
-  string? merchant_name;
-  string? merchant_id;
-  array<AndroidPayCardNetwork> allowed_card_networks;
-  AndroidPayTokenization tokenization_type;
-  array<AndroidPayTokenizationParameter> parameters;
-};
-
 enum PaymentComplete {
   SUCCESS,
   FAIL,