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diff --git a/Source/WebCore/bindings/js/CachedModuleScriptLoader.h b/Source/WebCore/bindings/js/CachedModuleScriptLoader.h
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+++ b/Source/WebCore/bindings/js/CachedModuleScriptLoader.h
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+/*
+ * 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 "CachedResourceClient.h"
+#include "CachedResourceHandle.h"
+#include <wtf/Ref.h>
+#include <wtf/RefCounted.h>
+#include <wtf/RefPtr.h>
+
+namespace WebCore {
+
+class CachedModuleScriptLoaderClient;
+class CachedScript;
+class CachedScriptFetcher;
+class DeferredPromise;
+class Document;
+class JSDOMGlobalObject;
+class URL;
+
+class CachedModuleScriptLoader final : public RefCounted<CachedModuleScriptLoader>, private CachedResourceClient {
+public:
+    static Ref<CachedModuleScriptLoader> create(CachedModuleScriptLoaderClient&, DeferredPromise&, CachedScriptFetcher&);
+
+    virtual ~CachedModuleScriptLoader();
+
+    bool load(Document&, const URL& sourceURL);
+
+    CachedScriptFetcher& scriptFetcher() { return m_scriptFetcher.get(); }
+    CachedScript* cachedScript() { return m_cachedScript.get(); }
+
+    void clearClient()
+    {
+        ASSERT(m_client);
+        m_client = nullptr;
+    }
+
+private:
+    CachedModuleScriptLoader(CachedModuleScriptLoaderClient&, DeferredPromise&, CachedScriptFetcher&);
+
+    void notifyFinished(CachedResource&) final;
+
+    CachedModuleScriptLoaderClient* m_client { nullptr };
+    RefPtr<DeferredPromise> m_promise;
+    Ref<CachedScriptFetcher> m_scriptFetcher;
+    CachedResourceHandle<CachedScript> m_cachedScript;
+};
+
+} // namespace WebCore