[Payments] Support canMakePayment on Desktop

components/payments/content/payment_request.cc

Index: components/payments/content/payment_request.cc
diff --git a/components/payments/content/payment_request.cc b/components/payments/content/payment_request.cc
index 77f03bf89c926850a998ed82f85d1ff1cd7b652f..fba230e1d8f5c5030a324e5746139a7881a6a894 100644
--- a/components/payments/content/payment_request.cc
+++ b/components/payments/content/payment_request.cc
@@ -84,8 +84,11 @@ void PaymentRequest::Complete(payments::mojom::PaymentComplete result) {
 }
 
 void PaymentRequest::CanMakePayment() {
-  // TODO(mathp): Return whether we can make payment.
-  client_->OnCanMakePayment(mojom::CanMakePaymentQueryResult::CAN_MAKE_PAYMENT);
+  // TODO(crbug.com/704676): Implement a quota policy for this method.
+  client_->OnCanMakePayment(
+      state()->CanMakePayment()
+          ? mojom::CanMakePaymentQueryResult::CAN_MAKE_PAYMENT
+          : mojom::CanMakePaymentQueryResult::CANNOT_MAKE_PAYMENT);
 }
 
 void PaymentRequest::OnInvalidSpecProvided() {