Implement request id in PaymentDetailsInit

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

Index: third_party/WebKit/Source/modules/payments/PaymentRequest.h
diff --git a/third_party/WebKit/Source/modules/payments/PaymentRequest.h b/third_party/WebKit/Source/modules/payments/PaymentRequest.h
index 681947e45fb57ca7406444ce2bc029b7439ee4b4..ed5b465b008e66b1e339e630d3e5db2f79a426de 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentRequest.h
+++ b/third_party/WebKit/Source/modules/payments/PaymentRequest.h
@@ -62,6 +62,7 @@ class MODULES_EXPORT PaymentRequest final
   ScriptPromise show(ScriptState*);
   ScriptPromise abort(ScriptState*);
 
+  const String& id() const { return m_id; }
   PaymentAddress* getShippingAddress() const { return m_shippingAddress.get(); }
   const String& shippingOption() const { return m_shippingOption; }
   const String& shippingType() const { return m_shippingType; }
@@ -117,6 +118,7 @@ class MODULES_EXPORT PaymentRequest final
 
   PaymentOptions m_options;
   Member<PaymentAddress> m_shippingAddress;
+  String m_id;
   String m_shippingOption;
   String m_shippingType;
   Member<ScriptPromiseResolver> m_showResolver;