Implement request id in PaymentDetailsInit

third_party/WebKit/Source/modules/payments/PaymentResponse.h

Index: third_party/WebKit/Source/modules/payments/PaymentResponse.h
diff --git a/third_party/WebKit/Source/modules/payments/PaymentResponse.h b/third_party/WebKit/Source/modules/payments/PaymentResponse.h
index d6b95895241b908d239e2232bbf6350d95d84486..8d7445860d887c5604966d524bb646b7673dd618 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentResponse.h
+++ b/third_party/WebKit/Source/modules/payments/PaymentResponse.h
@@ -30,11 +30,13 @@ class MODULES_EXPORT PaymentResponse final
 
  public:
   PaymentResponse(payments::mojom::blink::PaymentResponsePtr,
-                  PaymentCompleter*);
+                  PaymentCompleter*,
+                  const String& requestId = "");

[please use gerrit instead, 2017/03/27 21:16:05]

= "" would only be used in tests. I prefer to avoid test-only code in
production. Therefore, please make the |requestId| parameter required.

   virtual ~PaymentResponse();
 
   ScriptValue toJSONForBinding(ScriptState*) const;
 
+  const String& requestId() const { return m_requestId; }
   const String& methodName() const { return m_methodName; }
   ScriptValue details(ScriptState*, ExceptionState&) const;
   PaymentAddress* shippingAddress() const { return m_shippingAddress.get(); }
@@ -48,6 +50,7 @@ class MODULES_EXPORT PaymentResponse final
   DECLARE_TRACE();
 
  private:
+  String m_requestId;
   String m_methodName;
   String m_stringifiedDetails;
   Member<PaymentAddress> m_shippingAddress;