Revert of Merge MediaControlsChromium into MediaControls

Source/core/html/shadow/MediaControls.h

Index: Source/core/html/shadow/MediaControls.h
diff --git a/Source/core/html/shadow/MediaControls.h b/Source/core/html/shadow/MediaControls.h
index 3ac9dd106897b2c7480d4de2e921296d1d875197..fb3a6d940943d32bff101becc2d36cdd610a0ff5 100644
--- a/Source/core/html/shadow/MediaControls.h
+++ b/Source/core/html/shadow/MediaControls.h
@@ -41,10 +41,13 @@
 class RenderBox;
 class RenderMedia;
 
+// An abstract class with the media control elements that all ports support.
 class MediaControls : public HTMLDivElement {
-public:
+  public:
     virtual ~MediaControls() {}
 
+    // This function is to be implemented in your port-specific media
+    // controls implementation since it will return a child instance.
     static PassRefPtr<MediaControls> create(Document&);
 
     virtual void setMediaController(MediaControllerInterface*);
@@ -63,7 +66,7 @@
     virtual void playbackStopped();
 
     virtual void updateStatusDisplay() { };
-    virtual void updateCurrentTimeDisplay();
+    virtual void updateCurrentTimeDisplay() = 0;
     virtual void showVolumeSlider();
 
     virtual void changedMute();
@@ -86,12 +89,9 @@
     virtual void showTextTrackDisplay();
     virtual void hideTextTrackDisplay();
     virtual void updateTextTrackDisplay();
-    virtual void insertTextTrackContainer(PassRefPtr<MediaControlTextTrackContainerElement>);
 
 protected:
     explicit MediaControls(Document&);
-
-    bool initializeControls(Document&);
 
     virtual void defaultEventHandler(Event*) OVERRIDE;
 
@@ -122,9 +122,6 @@
     virtual bool isMediaControls() const OVERRIDE FINAL { return true; }
 
     virtual const AtomicString& shadowPseudoId() const OVERRIDE;
-
-    MediaControlTimeRemainingDisplayElement* m_durationDisplay;
-    MediaControlPanelEnclosureElement* m_enclosure;
 };
 
 DEFINE_NODE_TYPE_CASTS(MediaControls, isMediaControls());