WIPjarred/workers

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diff --git a/src/javascript/jsc/bindings/webcore/JSDOMPromise.h b/src/javascript/jsc/bindings/webcore/JSDOMPromise.h
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+++ b/src/javascript/jsc/bindings/webcore/JSDOMPromise.h
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+/*
+ * Copyright (C) 2013-2017 Apple Inc. All rights reserved.
+ * Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "JSDOMGuardedObject.h"
+#include <JavaScriptCore/JSPromise.h>
+
+namespace WebCore {
+
+class DOMPromise : public DOMGuarded<JSC::JSPromise> {
+public:
+    static Ref<DOMPromise> create(JSDOMGlobalObject& globalObject, JSC::JSPromise& promise)
+    {
+        return adoptRef(*new DOMPromise(globalObject, promise));
+    }
+
+    JSC::JSPromise* promise() const
+    {
+        ASSERT(!isSuspended());
+        return guarded();
+    }
+
+    enum class IsCallbackRegistered { No, Yes };
+    IsCallbackRegistered whenSettled(std::function<void()>&&);
+    JSC::JSValue result() const;
+
+    enum class Status { Pending, Fulfilled, Rejected };
+    Status status() const;
+
+    static IsCallbackRegistered whenPromiseIsSettled(JSDOMGlobalObject*, JSC::JSObject* promise, Function<void()>&&);
+
+private:
+    DOMPromise(JSDOMGlobalObject& globalObject, JSC::JSPromise& promise)
+        : DOMGuarded<JSC::JSPromise>(globalObject, promise)
+    {
+    }
+};
+
+} // namespace WebCore