Add canMakeActivePayment() method to web payments.

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 555e7b6b3743e877d61efa5a2caa0406e046d3d5..a01f5f8ee3f2251f44dbf93feb8bc793252eb011 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentRequest.h
+++ b/third_party/WebKit/Source/modules/payments/PaymentRequest.h
@@ -75,6 +75,8 @@ class MODULES_EXPORT PaymentRequest final
   DEFINE_ATTRIBUTE_EVENT_LISTENER(shippingaddresschange);
   DEFINE_ATTRIBUTE_EVENT_LISTENER(shippingoptionchange);
 
+  ScriptPromise canMakeActivePayment(ScriptState*);
+
   // ScriptWrappable:
   bool hasPendingActivity() const override;
 
@@ -111,6 +113,8 @@ class MODULES_EXPORT PaymentRequest final
   void OnError(payments::mojom::blink::PaymentErrorReason) override;
   void OnComplete() override;
   void OnAbort(bool abortedSuccessfully) override;
+  void OnCanMakeActivePayment(
+      payments::mojom::blink::ActivePaymentQueryResult) override;
 
   void onCompleteTimeout(TimerBase*);
 
@@ -124,6 +128,7 @@ class MODULES_EXPORT PaymentRequest final
   Member<ScriptPromiseResolver> m_showResolver;
   Member<ScriptPromiseResolver> m_completeResolver;
   Member<ScriptPromiseResolver> m_abortResolver;
+  Member<ScriptPromiseResolver> m_canMakeActivePaymentResolver;
   payments::mojom::blink::PaymentRequestPtr m_paymentProvider;
   mojo::Binding<payments::mojom::blink::PaymentRequestClient> m_clientBinding;
   Timer<PaymentRequest> m_completeTimer;