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diff --git a/Source/WebCore/Modules/encryptedmedia/MediaKeyStatusMap.h b/Source/WebCore/Modules/encryptedmedia/MediaKeyStatusMap.h
new file mode 100644
index 000000000..34c5ed795
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+++ b/Source/WebCore/Modules/encryptedmedia/MediaKeyStatusMap.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2016 Metrological Group B.V.
+ * Copyright (C) 2016 Igalia S.L.
+ *
+ * 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * HOLDER OR 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
+
+#if ENABLE(ENCRYPTED_MEDIA)
+
+#include "BufferSource.h"
+#include "MediaKeyStatus.h"
+#include <runtime/JSCJSValueInlines.h>
+#include <wtf/Optional.h>
+#include <wtf/Ref.h>
+#include <wtf/RefCounted.h>
+
+namespace WebCore {
+
+class MediaKeySession;
+class SharedBuffer;
+
+class MediaKeyStatusMap : public RefCounted<MediaKeyStatusMap> {
+public:
+    using Status = MediaKeyStatus;
+
+    static Ref<MediaKeyStatusMap> create(const MediaKeySession& session)
+    {
+        return adoptRef(*new MediaKeyStatusMap(session));
+    }
+
+    virtual ~MediaKeyStatusMap();
+
+    void detachSession();
+
+    unsigned long size();
+    bool has(const BufferSource&);
+    JSC::JSValue get(JSC::ExecState&, const BufferSource&);
+
+    class Iterator {
+    public:
+        explicit Iterator(MediaKeyStatusMap&);
+        std::optional<WTF::KeyValuePair<BufferSource::VariantType, MediaKeyStatus>> next();
+
+    private:
+        Ref<MediaKeyStatusMap> m_map;
+        size_t m_index { 0 };
+    };
+    Iterator createIterator() { return Iterator(*this); }
+
+private:
+    MediaKeyStatusMap(const MediaKeySession&);
+
+    const MediaKeySession* m_session;
+};
+
+} // namespace WebCore
+
+#endif // ENABLE(ENCRYPTED_MEDIA)