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diff --git a/Source/JavaScriptCore/runtime/JSPromiseConstructor.cpp b/Source/JavaScriptCore/runtime/JSPromiseConstructor.cpp
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+++ b/Source/JavaScriptCore/runtime/JSPromiseConstructor.cpp
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+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * 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.
+ */
+
+#include "config.h"
+#include "JSPromiseConstructor.h"
+
+#include "Error.h"
+#include "Exception.h"
+#include "IteratorOperations.h"
+#include "JSCBuiltins.h"
+#include "JSCJSValueInlines.h"
+#include "JSCellInlines.h"
+#include "JSPromise.h"
+#include "JSPromisePrototype.h"
+#include "Lookup.h"
+#include "NumberObject.h"
+#include "StructureInlines.h"
+
+namespace JSC {
+
+STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(JSPromiseConstructor);
+
+}
+
+#include "JSPromiseConstructor.lut.h"
+
+namespace JSC {
+
+const ClassInfo JSPromiseConstructor::s_info = { "Function", &InternalFunction::s_info, &promiseConstructorTable, CREATE_METHOD_TABLE(JSPromiseConstructor) };
+
+/* Source for JSPromiseConstructor.lut.h
+@begin promiseConstructorTable
+  resolve         JSPromiseConstructorFuncResolve             DontEnum|Function 1
+  reject          JSPromiseConstructorFuncReject              DontEnum|Function 1
+  race            JSPromiseConstructorFuncRace                DontEnum|Function 1
+  all             JSPromiseConstructorFuncAll                 DontEnum|Function 1
+@end
+*/
+
+JSPromiseConstructor* JSPromiseConstructor::create(VM& vm, Structure* structure, JSPromisePrototype* promisePrototype)
+{
+    JSPromiseConstructor* constructor = new (NotNull, allocateCell<JSPromiseConstructor>(vm.heap)) JSPromiseConstructor(vm, structure);
+    constructor->finishCreation(vm, promisePrototype);
+    return constructor;
+}
+
+Structure* JSPromiseConstructor::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
+{
+    return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
+}
+
+JSPromiseConstructor::JSPromiseConstructor(VM& vm, Structure* structure)
+    : InternalFunction(vm, structure)
+{
+}
+
+void JSPromiseConstructor::finishCreation(VM& vm, JSPromisePrototype* promisePrototype)
+{
+    Base::finishCreation(vm, ASCIILiteral("Promise"));
+    putDirectWithoutTransition(vm, vm.propertyNames->prototype, promisePrototype, DontEnum | DontDelete | ReadOnly);
+    putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(1), ReadOnly | DontEnum | DontDelete);
+}
+
+static EncodedJSValue JSC_HOST_CALL constructPromise(ExecState* exec)
+{
+    VM& vm = exec->vm();
+    JSGlobalObject* globalObject = exec->callee()->globalObject();
+
+    JSPromise* promise = JSPromise::create(vm, globalObject);
+
+    JSFunction* initializePromise = globalObject->initializePromiseFunction();
+    CallData callData;
+    CallType callType = getCallData(initializePromise, callData);
+    ASSERT(callType != CallTypeNone);
+
+    MarkedArgumentBuffer arguments;
+    arguments.append(exec->argument(0));
+    call(exec, initializePromise, callType, callData, promise, arguments);
+
+    return JSValue::encode(promise);
+}
+
+ConstructType JSPromiseConstructor::getConstructData(JSCell*, ConstructData& constructData)
+{
+    constructData.native.function = constructPromise;
+    return ConstructTypeHost;
+}
+
+CallType JSPromiseConstructor::getCallData(JSCell*, CallData& callData)
+{
+    callData.native.function = constructPromise;
+    return CallTypeHost;
+}
+
+bool JSPromiseConstructor::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
+{
+    return getStaticFunctionSlot<InternalFunction>(exec, promiseConstructorTable, jsCast<JSPromiseConstructor*>(object), propertyName, slot);
+}
+
+} // namespace JSC