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diff --git a/Source/WebKit2/UIProcess/API/C/WKMediaSessionFocusManager.h b/Source/WebKit2/UIProcess/API/C/WKMediaSessionFocusManager.h
new file mode 100644
index 000000000..ed39e705a
--- /dev/null
+++ b/Source/WebKit2/UIProcess/API/C/WKMediaSessionFocusManager.h
@@ -0,0 +1,72 @@
+/*
+ * 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 WKMediaSessionFocusManager_h
+#define WKMediaSessionFocusManager_h
+
+#include <WebKit/WKBase.h>
+
+#ifndef __cplusplus
+#include <stdbool.h>
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum WKMediaSessionFocusManagerPlaybackAttribute {
+    IsPlaying                     = 1 << 0,
+    IsPreviousTrackControlEnabled = 1 << 1,
+    IsNextTrackControlEnabled     = 1 << 2,
+};
+typedef uint32_t WKMediaSessionFocusManagerPlaybackAttributes;
+
+// Media Session Focus Manager Client
+typedef void (*WKMediaSessionFocusManagerDidChangePlaybackAttribute)(WKMediaSessionFocusManagerRef manager, WKMediaSessionFocusManagerPlaybackAttribute playbackAttribute, bool value, const void *clientInfo);
+
+typedef struct WKMediaSessionFocusManagerClientBase {
+    int                                                  version;
+    const void *                                         clientInfo;
+} WKMediaSessionFocusManagerClientBase;
+
+typedef struct WKMediaSessionFocusManagerClientV0 {
+    WKMediaSessionFocusManagerClientBase                 base;
+
+    // Version 0.
+    WKMediaSessionFocusManagerDidChangePlaybackAttribute didChangePlaybackAttribute;
+} WKMediaSessionFocusManagerClientV0;
+
+WK_EXPORT WKTypeID WKMediaSessionFocusManagerGetTypeID();
+
+WK_EXPORT void WKMediaSessionFocusManagerSetClient(WKMediaSessionFocusManagerRef manager, const WKMediaSessionFocusManagerClientBase* client);
+
+WK_EXPORT bool WKMediaSessionFocusManagerValueForPlaybackAttribute(WKMediaSessionFocusManagerRef, WKMediaSessionFocusManagerPlaybackAttribute);
+WK_EXPORT void WKMediaSessionFocusManagerSetVolumeOfFocusedMediaElement(WKMediaSessionFocusManagerRef, double);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* WKMediaSessionFocusManager_h */