PaymentHandler: Implement PaymentInstruments.has().

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

Index: third_party/WebKit/Source/modules/payments/PaymentInstruments.h
diff --git a/third_party/WebKit/Source/modules/payments/PaymentInstruments.h b/third_party/WebKit/Source/modules/payments/PaymentInstruments.h
index b633097b3c3feb4be4a4cbd5ffc8c0d905e3ac79..4bb1f202c375b781c22d3a680c7e09600cc89b1f 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentInstruments.h
+++ b/third_party/WebKit/Source/modules/payments/PaymentInstruments.h
@@ -32,7 +32,7 @@ class MODULES_EXPORT PaymentInstruments final
   ScriptPromise deleteInstrument(ScriptState*, const String& instrument_key);
   ScriptPromise get(ScriptState*, const String& instrument_key);
   ScriptPromise keys();
-  ScriptPromise has(const String& instrument_key);
+  ScriptPromise has(ScriptState*, const String& instrument_key);
   ScriptPromise set(ScriptState*,
                     const String& instrument_key,
                     const PaymentInstrument& details,
@@ -46,6 +46,8 @@ class MODULES_EXPORT PaymentInstruments final
   void onGetPaymentInstrument(ScriptPromiseResolver*,
                               payments::mojom::blink::PaymentInstrumentPtr,
                               payments::mojom::blink::PaymentHandlerStatus);
+  void onHasPaymentInstrument(ScriptPromiseResolver*,
+                              payments::mojom::blink::PaymentHandlerStatus);
   void onSetPaymentInstrument(ScriptPromiseResolver*,
                               payments::mojom::blink::PaymentHandlerStatus);