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diff --git a/Source/WebCore/bindings/js/ScriptModuleLoader.h b/Source/WebCore/bindings/js/ScriptModuleLoader.h
new file mode 100644
index 000000000..6e7a61b57
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+++ b/Source/WebCore/bindings/js/ScriptModuleLoader.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2015, 2016 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.
+ */
+
+#pragma once
+
+#include "CachedModuleScriptLoader.h"
+#include "CachedModuleScriptLoaderClient.h"
+#include "URL.h"
+#include "URLHash.h"
+#include <runtime/JSCJSValue.h>
+#include <wtf/Noncopyable.h>
+
+namespace JSC {
+
+class ExecState;
+class JSGlobalObject;
+class JSInternalPromise;
+class JSModuleLoader;
+class SourceOrigin;
+
+}
+
+namespace WebCore {
+
+class Document;
+class JSDOMGlobalObject;
+
+class ScriptModuleLoader final : private CachedModuleScriptLoaderClient {
+    WTF_MAKE_NONCOPYABLE(ScriptModuleLoader); WTF_MAKE_FAST_ALLOCATED;
+public:
+    explicit ScriptModuleLoader(Document&);
+    ~ScriptModuleLoader();
+
+    Document& document() { return m_document; }
+
+    JSC::JSInternalPromise* resolve(JSC::JSGlobalObject*, JSC::ExecState*, JSC::JSModuleLoader*, JSC::JSValue moduleName, JSC::JSValue importerModuleKey, JSC::JSValue scriptFetcher);
+    JSC::JSInternalPromise* fetch(JSC::JSGlobalObject*, JSC::ExecState*, JSC::JSModuleLoader*, JSC::JSValue moduleKey, JSC::JSValue scriptFetcher);
+    JSC::JSValue evaluate(JSC::JSGlobalObject*, JSC::ExecState*, JSC::JSModuleLoader*, JSC::JSValue moduleKey, JSC::JSValue moduleRecord, JSC::JSValue scriptFetcher);
+    JSC::JSInternalPromise* importModule(JSC::JSGlobalObject*, JSC::ExecState*, JSC::JSModuleLoader*, JSC::JSString*, const JSC::SourceOrigin&);
+
+private:
+    void notifyFinished(CachedModuleScriptLoader&, RefPtr<DeferredPromise>) final;
+
+    Document& m_document;
+    HashMap<URL, URL> m_requestURLToResponseURLMap;
+    HashSet<Ref<CachedModuleScriptLoader>> m_loaders;
+};
+
+} // namespace WebCore