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diff --git a/Source/WebKit2/UIProcess/WebMediaSessionFocusManager.h b/Source/WebKit2/UIProcess/WebMediaSessionFocusManager.h
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+/*
+ * Copyright (C) 2015 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.
+ */
+
+#ifndef WebMediaSessionFocusManager_h
+#define WebMediaSessionFocusManager_h
+
+#if ENABLE(MEDIA_SESSION)
+
+#include "APIObject.h"
+#include "WebContextSupplement.h"
+#include "WebMediaSessionFocusManagerClient.h"
+#include "WebPageProxy.h"
+
+namespace WebKit {
+
+typedef std::pair<WebPageProxy*, uint64_t> FocusedMediaElement;
+
+class WebMediaSessionFocusManager : public API::ObjectImpl<API::Object::Type::MediaSessionFocusManager>, public WebContextSupplement {
+public:
+    static const char* supplementName();
+
+    static PassRefPtr<WebMediaSessionFocusManager> create(WebProcessPool*);
+
+    void initializeClient(const WKMediaSessionFocusManagerClientBase*);
+
+    bool valueForPlaybackAttribute(WKMediaSessionFocusManagerPlaybackAttribute) const;
+    void updatePlaybackAttributesFromMediaState(WebPageProxy*, uint64_t, WebCore::MediaProducer::MediaStateFlags);
+    void setVolumeOfFocusedMediaElement(double);
+
+    void setFocusedMediaElement(WebPageProxy&, uint64_t);
+    void clearFocusedMediaElement();
+
+    using API::Object::ref;
+    using API::Object::deref;
+
+private:
+    explicit WebMediaSessionFocusManager(WebProcessPool*);
+
+    // WebContextSupplement
+    void refWebContextSupplement() override;
+    void derefWebContextSupplement() override;
+
+    void updatePlaybackAttribute(WKMediaSessionFocusManagerPlaybackAttribute, bool);
+
+    std::unique_ptr<FocusedMediaElement> m_focusedMediaElement;
+    WKMediaSessionFocusManagerPlaybackAttributes m_playbackAttributes { 0 };
+    WebMediaSessionFocusManagerClient m_client;
+};
+
+} // namespace WebKit
+
+#endif // ENABLE(MEDIA_SESSION)
+
+#endif /* WebMediaSessionFocusManager_h */