Support text track selection in video controls

Source/core/html/shadow/MediaControlElements.h

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google 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.
@@ skipping 16 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef MediaControlElements_h
 #define MediaControlElements_h
 
 #include "core/html/shadow/MediaControlElementTypes.h"
 
 namespace blink {
 
+class TextTrack;
+
 // ----------------------------
 
 class MediaControlPanelElement final : public MediaControlDivElement {
 public:
     static PassRefPtrWillBeRawPtr<MediaControlPanelElement> create(MediaControls&);
 
     void setIsDisplayed(bool);
 
     void makeOpaque();
     void makeTransparent();
@@ skipping 92 matching lines @@
     virtual void updateDisplayType() override;
 
 private:
     explicit MediaControlToggleClosedCaptionsButtonElement(MediaControls&);
 
     virtual void defaultEventHandler(Event*) override;
 };
 
 // ----------------------------
 
+class MediaControlTextTrackListElement final : public MediaControlDivElement {
+public:
+    static PassRefPtrWillBeRawPtr<MediaControlTextTrackListElement> create(MediaControls&);
+
+    virtual bool willRespondToMouseClickEvents() override { return true; }
+
+    void refreshTextTrackListMenu();
+
+private:
+    explicit MediaControlTextTrackListElement(MediaControls&);
+
+    virtual void defaultEventHandler(Event*) override;
+
+    String getTextTrackLabel(TextTrack*);
+
+    RefPtrWillBeRawPtr<Element> createTextTrackListItem(TextTrack*);
+
+    void showTextTrackAtIndex(unsigned);
+};
+
+// ----------------------------
+
 class MediaControlTimelineElement final : public MediaControlInputElement {
 public:
     static PassRefPtrWillBeRawPtr<MediaControlTimelineElement> create(MediaControls&);
 
     virtual bool willRespondToMouseClickEvents() override;
 
     // FIXME: An "earliest possible position" will be needed once that concept
     // is supported by HTMLMediaElement, see https://crbug.com/137275
     void setPosition(double);
     void setDuration(double);
@@ skipping 74 matching lines @@
 public:
     static PassRefPtrWillBeRawPtr<MediaControlCurrentTimeDisplayElement> create(MediaControls&);
 
 private:
     explicit MediaControlCurrentTimeDisplayElement(MediaControls&);
 };
 
 } // namespace blink
 
 #endif // MediaControlElements_h