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diff --git a/Source/WebCore/html/track/VTTCue.h b/Source/WebCore/html/track/VTTCue.h
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+++ b/Source/WebCore/html/track/VTTCue.h
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+/*
+ * Copyright (C) 2011, 2013 Google Inc. All rights reserved.
+ * Copyright (C) 2012-2014 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. 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(VIDEO_TRACK)
+
+#include "EventTarget.h"
+#include "HTMLElement.h"
+#include "TextTrackCue.h"
+
+namespace WebCore {
+
+class DocumentFragment;
+class HTMLDivElement;
+class HTMLSpanElement;
+class ScriptExecutionContext;
+class VTTCue;
+class VTTScanner;
+class WebVTTCueData;
+
+// ----------------------------
+
+class VTTCueBox : public HTMLElement {
+public:
+    static Ref<VTTCueBox> create(Document&, VTTCue&);
+
+    VTTCue* getCue() const;
+    virtual void applyCSSProperties(const IntSize& videoSize);
+
+    static const AtomicString& vttCueBoxShadowPseudoId();
+    void setFontSizeFromCaptionUserPrefs(int fontSize) { m_fontSizeFromCaptionUserPrefs = fontSize; }
+
+protected:
+    VTTCueBox(Document&, VTTCue&);
+
+    RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
+
+    VTTCue& m_cue;
+    int m_fontSizeFromCaptionUserPrefs;
+};
+
+// ----------------------------
+
+class VTTCue : public TextTrackCue {
+public:
+    static Ref<VTTCue> create(ScriptExecutionContext& context, double start, double end, const String& content)
+    {
+        return create(context, MediaTime::createWithDouble(start), MediaTime::createWithDouble(end), content);
+    }
+
+    static Ref<VTTCue> create(ScriptExecutionContext& context, const MediaTime& start, const MediaTime& end, const String& content)
+    {
+        return adoptRef(*new VTTCue(context, start, end, content));
+    }
+
+    static Ref<VTTCue> create(ScriptExecutionContext&, const WebVTTCueData&);
+
+    static const AtomicString& cueBackdropShadowPseudoId();
+
+    virtual ~VTTCue();
+
+    const String& vertical() const;
+    ExceptionOr<void> setVertical(const String&);
+
+    bool snapToLines() const { return m_snapToLines; }
+    void setSnapToLines(bool);
+
+    double line() const { return m_linePosition; }
+    virtual ExceptionOr<void> setLine(double);
+
+    double position() const { return m_textPosition; }
+    virtual ExceptionOr<void> setPosition(double);
+
+    int size() const { return m_cueSize; }
+    ExceptionOr<void> setSize(int);
+
+    const String& align() const;
+    ExceptionOr<void> setAlign(const String&);
+
+    const String& text() const { return m_content; }
+    void setText(const String&);
+
+    const String& cueSettings() const { return m_settings; }
+    void setCueSettings(const String&);
+
+    RefPtr<DocumentFragment> getCueAsHTML();
+    RefPtr<DocumentFragment> createCueRenderingTree();
+
+    const String& regionId() const { return m_regionId; }
+    void setRegionId(const String&);
+    void notifyRegionWhenRemovingDisplayTree(bool);
+
+    void setIsActive(bool) override;
+
+    bool hasDisplayTree() const { return m_displayTree; }
+    VTTCueBox& getDisplayTree(const IntSize& videoSize, int fontSize);
+    HTMLSpanElement& element() const { return *m_cueHighlightBox; }
+
+    void updateDisplayTree(const MediaTime&);
+    void removeDisplayTree();
+    void markFutureAndPastNodes(ContainerNode*, const MediaTime&, const MediaTime&);
+
+    int calculateComputedLinePosition();
+    std::pair<double, double> getPositionCoordinates() const;
+
+    std::pair<double, double> getCSSPosition() const;
+
+    CSSValueID getCSSAlignment() const;
+    int getCSSSize() const;
+    CSSValueID getCSSWritingDirection() const;
+    CSSValueID getCSSWritingMode() const;
+
+    enum WritingDirection {
+        Horizontal = 0,
+        VerticalGrowingLeft,
+        VerticalGrowingRight,
+        NumberOfWritingDirections
+    };
+    WritingDirection getWritingDirection() const { return m_writingDirection; }
+
+    enum CueAlignment {
+        Start = 0,
+        Middle,
+        End,
+        Left,
+        Right,
+        NumberOfAlignments
+    };
+    CueAlignment getAlignment() const { return m_cueAlignment; }
+
+    virtual void setFontSize(int, const IntSize&, bool important);
+
+    bool isEqual(const TextTrackCue&, CueMatchRules) const override;
+    bool cueContentsMatch(const TextTrackCue&) const override;
+    bool doesExtendCue(const TextTrackCue&) const override;
+
+    CueType cueType() const override { return WebVTT; }
+    bool isRenderable() const final { return true; }
+
+    void didChange() override;
+
+protected:
+    VTTCue(ScriptExecutionContext&, const MediaTime& start, const MediaTime& end, const String& content);
+    VTTCue(ScriptExecutionContext&, const WebVTTCueData&);
+
+    virtual Ref<VTTCueBox> createDisplayTree();
+    VTTCueBox& displayTreeInternal();
+
+private:
+    void initialize(ScriptExecutionContext&);
+    void createWebVTTNodeTree();
+    void copyWebVTTNodeToDOMTree(ContainerNode* WebVTTNode, ContainerNode* root);
+
+    void parseSettings(const String&);
+
+    void determineTextDirection();
+    void calculateDisplayParameters();
+
+    enum CueSetting {
+        None,
+        Vertical,
+        Line,
+        Position,
+        Size,
+        Align,
+        RegionId
+    };
+    CueSetting settingName(VTTScanner&);
+
+    String m_content;
+    String m_settings;
+    double m_linePosition;
+    double m_computedLinePosition;
+    double m_textPosition;
+    int m_cueSize;
+
+    WritingDirection m_writingDirection;
+    CueAlignment m_cueAlignment;
+    String m_regionId;
+
+    RefPtr<DocumentFragment> m_webVTTNodeTree;
+    RefPtr<HTMLSpanElement> m_cueHighlightBox;
+    RefPtr<HTMLDivElement> m_cueBackdropBox;
+    RefPtr<VTTCueBox> m_displayTree;
+
+    CSSValueID m_displayDirection;
+    int m_displaySize;
+    std::pair<float, float> m_displayPosition;
+
+    MediaTime m_originalStartTime;
+
+    bool m_snapToLines : 1;
+    bool m_displayTreeShouldChange : 1;
+    bool m_notifyRegion : 1;
+};
+
+VTTCue* toVTTCue(TextTrackCue*);
+const VTTCue* toVTTCue(const TextTrackCue*);
+
+} // namespace WebCore
+
+#endif