PaymentHandler: Implement PaymentInstruments.has().

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

Index: third_party/WebKit/Source/modules/payments/PaymentInstruments.cpp
diff --git a/third_party/WebKit/Source/modules/payments/PaymentInstruments.cpp b/third_party/WebKit/Source/modules/payments/PaymentInstruments.cpp
index fe1336b7c35e7f35730d05a230bc4e8abd9a6753..69008ce9ba300245c82d45b41ae5d482f855afbd 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentInstruments.cpp
+++ b/third_party/WebKit/Source/modules/payments/PaymentInstruments.cpp
@@ -94,9 +94,22 @@ ScriptPromise PaymentInstruments::keys() {
   return ScriptPromise();
 }
 
-ScriptPromise PaymentInstruments::has(const String& instrument_key) {
-  NOTIMPLEMENTED();
-  return ScriptPromise();
+ScriptPromise PaymentInstruments::has(ScriptState* script_state,
+                                      const String& instrument_key) {
+  if (!manager_.is_bound()) {
+    return ScriptPromise::RejectWithDOMException(
+        script_state,
+        DOMException::Create(kInvalidStateError, kPaymentManagerUnavailable));
+  }
+
+  ScriptPromiseResolver* resolver = ScriptPromiseResolver::Create(script_state);
+  ScriptPromise promise = resolver->Promise();
+
+  manager_->HasPaymentInstrument(
+      instrument_key, ConvertToBaseCallback(WTF::Bind(
+                          &PaymentInstruments::onHasPaymentInstrument,
+                          WrapPersistent(this), WrapPersistent(resolver))));
+  return promise;
 }
 
 ScriptPromise PaymentInstruments::set(ScriptState* script_state,
@@ -184,6 +197,14 @@ void PaymentInstruments::onGetPaymentInstrument(
   resolver->Resolve(instrument);
 }
 
+void PaymentInstruments::onHasPaymentInstrument(
+    ScriptPromiseResolver* resolver,
+    payments::mojom::blink::PaymentHandlerStatus status) {
+  DCHECK(resolver);
+  resolver->Resolve(status ==
+                    payments::mojom::blink::PaymentHandlerStatus::SUCCESS);
+}
+
 void PaymentInstruments::onSetPaymentInstrument(
     ScriptPromiseResolver* resolver,
     payments::mojom::blink::PaymentHandlerStatus status) {