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diff --git a/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeys.h b/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeys.h
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+++ b/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeys.h
@@ -0,0 +1,70 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#if ENABLE(LEGACY_ENCRYPTED_MEDIA)
+
+#include "LegacyCDM.h"
+#include "ExceptionOr.h"
+#include <runtime/Uint8Array.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+
+class HTMLMediaElement;
+class ScriptExecutionContext;
+class WebKitMediaKeySession;
+
+class WebKitMediaKeys final : public RefCounted<WebKitMediaKeys>, private CDMClient {
+public:
+    static ExceptionOr<Ref<WebKitMediaKeys>> create(const String& keySystem);
+    virtual ~WebKitMediaKeys();
+
+    ExceptionOr<Ref<WebKitMediaKeySession>> createSession(ScriptExecutionContext&, const String& mimeType, Ref<Uint8Array>&& initData);
+    static bool isTypeSupported(const String& keySystem, const String& mimeType);
+    const String& keySystem() const { return m_keySystem; }
+
+    CDM& cdm() { ASSERT(m_cdm); return *m_cdm; }
+
+    void setMediaElement(HTMLMediaElement*);
+
+    void keyAdded();
+    RefPtr<ArrayBuffer> cachedKeyForKeyId(const String& keyId) const;
+
+private:
+    MediaPlayer* cdmMediaPlayer(const CDM*) const final;
+
+    WebKitMediaKeys(const String& keySystem, std::unique_ptr<CDM>&&);
+
+    Vector<Ref<WebKitMediaKeySession>> m_sessions;
+    HTMLMediaElement* m_mediaElement { nullptr };
+    String m_keySystem;
+    std::unique_ptr<CDM> m_cdm;
+};
+
+}
+
+#endif // ENABLE(LEGACY_ENCRYPTED_MEDIA)