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diff --git a/Source/WebCore/page/CaptionUserPreferencesMediaAF.h b/Source/WebCore/page/CaptionUserPreferencesMediaAF.h
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+++ b/Source/WebCore/page/CaptionUserPreferencesMediaAF.h
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+/*
+ * Copyright (C) 2012-2015 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. ``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
+ * 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(VIDEO_TRACK)
+
+#include "CSSPropertyNames.h"
+#include "CaptionUserPreferences.h"
+#include "Color.h"
+
+namespace WebCore {
+
+class CaptionUserPreferencesMediaAF : public CaptionUserPreferences {
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    CaptionUserPreferencesMediaAF(PageGroup&);
+    virtual ~CaptionUserPreferencesMediaAF();
+
+#if HAVE(MEDIA_ACCESSIBILITY_FRAMEWORK)
+    CaptionDisplayMode captionDisplayMode() const override;
+    void setCaptionDisplayMode(CaptionDisplayMode) override;
+
+    bool userPrefersCaptions() const override;
+    bool userPrefersSubtitles() const override;
+
+    float captionFontSizeScaleAndImportance(bool&) const override;
+
+    void setInterestedInCaptionPreferenceChanges() override;
+
+    void setPreferredLanguage(const String&) override;
+    Vector<String> preferredLanguages() const override;
+
+    void setPreferredAudioCharacteristic(const String&) override;
+    Vector<String> preferredAudioCharacteristics() const override;
+
+    void captionPreferencesChanged() override;
+
+    bool shouldFilterTrackMenu() const { return true; }
+#else
+    bool shouldFilterTrackMenu() const { return false; }
+#endif
+
+    String captionsStyleSheetOverride() const override;
+    int textTrackSelectionScore(TextTrack*, HTMLMediaElement*) const override;
+    Vector<RefPtr<AudioTrack>> sortedTrackListForMenu(AudioTrackList*) override;
+    Vector<RefPtr<TextTrack>> sortedTrackListForMenu(TextTrackList*) override;
+    String displayNameForTrack(AudioTrack*) const override;
+    String displayNameForTrack(TextTrack*) const override;
+
+private:
+#if HAVE(MEDIA_ACCESSIBILITY_FRAMEWORK)
+    void updateTimerFired();
+
+    String captionsWindowCSS() const;
+    String captionsBackgroundCSS() const;
+    String captionsTextColorCSS() const;
+    Color captionsTextColor(bool&) const;
+    String captionsDefaultFontCSS() const;
+    Color captionsEdgeColorForTextColor(const Color&) const;
+    String windowRoundedCornerRadiusCSS() const;
+    String strokeWidth() const;
+    String captionsTextEdgeCSS() const;
+    String cssPropertyWithTextEdgeColor(CSSPropertyID, const String&, const Color&, bool) const;
+    String colorPropertyCSS(CSSPropertyID, const Color&, bool) const;
+    Timer m_updateStyleSheetTimer;
+
+    bool m_listeningForPreferenceChanges;
+    bool m_registeringForNotification { false };
+#endif
+};
+
+} // namespace WebCore
+
+#endif // ENABLE(VIDEO_TRACK)