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diff --git a/Source/WebCore/Modules/mediastream/MediaEndpointSessionDescription.h b/Source/WebCore/Modules/mediastream/MediaEndpointSessionDescription.h
new file mode 100644
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+++ b/Source/WebCore/Modules/mediastream/MediaEndpointSessionDescription.h
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+/*
+ * Copyright (C) 2015, 2016 Ericsson AB. 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.
+ * 3. Neither the name of Ericsson nor the names of its contributors
+ *    may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * 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
+ * OWNER 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(WEB_RTC)
+
+#include "ExceptionOr.h"
+#include "RTCSessionDescription.h"
+#include <wtf/RefCounted.h>
+#include <wtf/RefPtr.h>
+
+namespace WebCore {
+
+class MediaEndpointSessionConfiguration;
+class SDPProcessor;
+class DOMError;
+
+class MediaEndpointSessionDescription : public RefCounted<MediaEndpointSessionDescription> {
+public:
+    static Ref<MediaEndpointSessionDescription> create(RTCSessionDescription::SdpType, RefPtr<MediaEndpointSessionConfiguration>&&);
+    static ExceptionOr<Ref<MediaEndpointSessionDescription>> create(RefPtr<RTCSessionDescription>&&, const SDPProcessor&);
+    virtual ~MediaEndpointSessionDescription() { } // FIXME: Why is this virtual? There are no other virtual functions in this class.
+
+    RefPtr<RTCSessionDescription> toRTCSessionDescription(const SDPProcessor&) const;
+
+    RTCSessionDescription::SdpType type() const { return m_type; }
+    const String& typeString() const;
+    MediaEndpointSessionConfiguration* configuration() const { return m_configuration.get(); }
+
+    bool isLaterThan(MediaEndpointSessionDescription* other) const;
+
+private:
+    MediaEndpointSessionDescription(RTCSessionDescription::SdpType type, RefPtr<MediaEndpointSessionConfiguration>&& configuration, RefPtr<RTCSessionDescription>&& rtcDescription)
+        : m_type(type)
+        , m_configuration(configuration)
+        , m_rtcDescription(WTFMove(rtcDescription))
+    { }
+
+    RTCSessionDescription::SdpType m_type;
+    RefPtr<MediaEndpointSessionConfiguration> m_configuration;
+
+    RefPtr<RTCSessionDescription> m_rtcDescription;
+};
+
+} // namespace WebCore
+
+#endif // ENABLE(WEB_RTC)