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diff --git a/Source/WebCore/Modules/encryptedmedia/legacy/LegacyCDM.h b/Source/WebCore/Modules/encryptedmedia/legacy/LegacyCDM.h
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+++ b/Source/WebCore/Modules/encryptedmedia/legacy/LegacyCDM.h
@@ -0,0 +1,81 @@
+/*
+ * 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 "LegacyCDMSession.h"
+#include <runtime/Uint8Array.h>
+#include <wtf/Forward.h>
+#include <wtf/text/WTFString.h>
+
+namespace WebCore {
+
+class CDM;
+class CDMPrivateInterface;
+class MediaPlayer;
+
+typedef std::function<std::unique_ptr<CDMPrivateInterface> (CDM*)> CreateCDM;
+typedef bool (*CDMSupportsKeySystem)(const String&);
+typedef bool (*CDMSupportsKeySystemAndMimeType)(const String&, const String&);
+
+class CDMClient {
+public:
+    virtual ~CDMClient() { }
+
+    virtual MediaPlayer* cdmMediaPlayer(const CDM*) const = 0;
+};
+
+class CDM {
+public:
+    explicit CDM(const String& keySystem);
+
+    enum CDMErrorCode { NoError, UnknownError, ClientError, ServiceError, OutputError, HardwareChangeError, DomainError };
+    static bool supportsKeySystem(const String&);
+    static bool keySystemSupportsMimeType(const String& keySystem, const String& mimeType);
+    static std::unique_ptr<CDM> create(const String& keySystem);
+    WEBCORE_EXPORT static void registerCDMFactory(CreateCDM, CDMSupportsKeySystem, CDMSupportsKeySystemAndMimeType);
+    ~CDM();
+
+    bool supportsMIMEType(const String&) const;
+    std::unique_ptr<CDMSession> createSession(CDMSessionClient&);
+
+    const String& keySystem() const { return m_keySystem; }
+
+    CDMClient* client() const { return m_client; }
+    void setClient(CDMClient* client) { m_client = client; }
+
+    MediaPlayer* mediaPlayer() const;
+
+private:
+    String m_keySystem;
+    std::unique_ptr<CDMPrivateInterface> m_private;
+    CDMClient* m_client;
+};
+
+}
+
+#endif // ENABLE(LEGACY_ENCRYPTED_MEDIA)