Remove unused code behind USE(PLATFORM_TEXT_TRACK_MENU)

Source/core/html/HTMLMediaElement.h

Index: Source/core/html/HTMLMediaElement.h
diff --git a/Source/core/html/HTMLMediaElement.h b/Source/core/html/HTMLMediaElement.h
index 392301d2fb09d5eaf1bfff215ee886d158206c08..63e122ec2c3d62c9840e3d4f2106d7685f930d02 100644
--- a/Source/core/html/HTMLMediaElement.h
+++ b/Source/core/html/HTMLMediaElement.h
@@ -67,9 +67,6 @@ typedef Vector<CueInterval> CueList;
 
 class HTMLMediaElement : public HTMLElement, public MediaPlayerClient, public ActiveDOMObject, public MediaControllerInterface
     , private TextTrackClient
-#if USE(PLATFORM_TEXT_TRACK_MENU)
-    , public PlatformTextTrackMenuClient
-#endif
 {
 public:
     MediaPlayer* player() const { return m_player.get(); }
@@ -213,12 +210,6 @@ public:
     virtual void mediaPlayerDidAddTrack(PassRefPtr<InbandTextTrackPrivate>) OVERRIDE;
     virtual void mediaPlayerDidRemoveTrack(PassRefPtr<InbandTextTrackPrivate>) OVERRIDE;
 
-#if USE(PLATFORM_TEXT_TRACK_MENU)
-    virtual void setSelectedTextTrack(PassRefPtr<PlatformTextTrack>) OVERRIDE;
-    virtual Vector<RefPtr<PlatformTextTrack> > platformTextTracks() OVERRIDE;
-    PlatformTextTrackMenuInterface* platformTextTrackMenu();
-#endif
-
     struct TrackGroup {
         enum GroupKind { CaptionsAndSubtitles, Description, Chapter, Metadata, Other };
 
@@ -634,10 +625,6 @@ private:
 #if ENABLE(ENCRYPTED_MEDIA_V2)
     RefPtr<MediaKeys> m_mediaKeys;
 #endif
-
-#if USE(PLATFORM_TEXT_TRACK_MENU)
-    RefPtr<PlatformTextTrackMenuInterface> m_platformMenu;
-#endif
 };
 
 #ifndef NDEBUG