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diff --git a/Source/WebCore/Modules/mediacontrols/MediaControlsHost.h b/Source/WebCore/Modules/mediacontrols/MediaControlsHost.h
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+++ b/Source/WebCore/Modules/mediacontrols/MediaControlsHost.h
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+/*
+ * Copyright (C) 2013, 2014 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(MEDIA_CONTROLS_SCRIPT)
+
+#include <bindings/ScriptObject.h>
+#include <wtf/RefCounted.h>
+#include <wtf/Variant.h>
+#include <wtf/Vector.h>
+#include <wtf/text/WTFString.h>
+
+namespace WebCore {
+
+class AudioTrack;
+class AudioTrackList;
+class Element;
+class HTMLMediaElement;
+class MediaControlTextTrackContainerElement;
+class TextTrack;
+class TextTrackList;
+
+class MediaControlsHost : public RefCounted<MediaControlsHost> {
+public:
+    static Ref<MediaControlsHost> create(HTMLMediaElement*);
+    ~MediaControlsHost();
+
+    static const AtomicString& automaticKeyword();
+    static const AtomicString& forcedOnlyKeyword();
+    static const AtomicString& alwaysOnKeyword();
+    static const AtomicString& manualKeyword();
+
+    Vector<RefPtr<TextTrack>> sortedTrackListForMenu(TextTrackList&);
+    Vector<RefPtr<AudioTrack>> sortedTrackListForMenu(AudioTrackList&);
+
+    using TextOrAudioTrack = WTF::Variant<RefPtr<TextTrack>, RefPtr<AudioTrack>>;
+    String displayNameForTrack(const std::optional<TextOrAudioTrack>&);
+
+    TextTrack* captionMenuOffItem();
+    TextTrack* captionMenuAutomaticItem();
+    AtomicString captionDisplayMode() const;
+    void setSelectedTextTrack(TextTrack*);
+    Element* textTrackContainer();
+    void updateTextTrackContainer();
+    bool allowsInlineMediaPlayback() const;
+    bool supportsFullscreen() const;
+    bool isVideoLayerInline() const;
+    bool isInMediaDocument() const;
+    bool userGestureRequired() const;
+    void setPreparedToReturnVideoLayerToInline(bool);
+
+    void updateCaptionDisplaySizes();
+    void enteredFullscreen();
+    void exitedFullscreen();
+
+    String externalDeviceDisplayName() const;
+
+    enum class DeviceType { None, Airplay, Tvout };
+    DeviceType externalDeviceType() const;
+
+    bool controlsDependOnPageScaleFactor() const;
+    void setControlsDependOnPageScaleFactor(bool v);
+
+    String generateUUID() const;
+
+    String shadowRootCSSText() const;
+    String base64StringForIconAndPlatform(const String& iconName, const String& platform) const;
+
+private:
+    MediaControlsHost(HTMLMediaElement*);
+
+    HTMLMediaElement* m_mediaElement;
+    RefPtr<MediaControlTextTrackContainerElement> m_textTrackContainer;
+};
+
+}
+
+#endif