Media Controls: move all MediaControlDivElement sub-classes to modules/.

third_party/WebKit/Source/core/html/media/MediaControls.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MediaControls_h
 #define MediaControls_h
 
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "platform/heap/Visitor.h"
 
 namespace blink {
 
 class Document;
+class HTMLDivElement;
 class HTMLMediaElement;
 class LayoutObject;
-class MediaControlPanelElement;
 class ShadowRoot;
 
 // MediaControls is an interface to abstract the HTMLMediaElement controls. The
 // implementation will be used using a Factory (see below).
 class CORE_EXPORT MediaControls : public GarbageCollectedMixin {
  public:
   // Factory class that HTMLMediaElement uses to create the MediaControls
   // instance. MediaControls implementations are expected to implement a factory
   // class and provide an implementation of it to HTMLMediaElement via
   // `::registerMediaControlsFactory()`.
@@ skipping 37 matching lines @@
   // used for overlap checking during text track layout. May be null.
   // TODO(mlamouri): required by LayoutVTTCue.
   virtual LayoutObject* PanelLayoutObject() = 0;
   // Returns the layout object of the media controls container. Maybe null.
   // TODO(mlamouri): required by LayoutVTTCue.
   virtual LayoutObject* ContainerLayoutObject() = 0;
 
   // TODO: the following are required by other parts of the media controls
   // implementation and could be removed when the full implementation has moved
   // to modules.
-  virtual MediaControlPanelElement* PanelElement() = 0;
+  virtual HTMLDivElement* PanelElement() = 0;
   virtual Document& OwnerDocument() = 0;
   virtual void BeginScrubbing() = 0;
   virtual void EndScrubbing() = 0;
   virtual void UpdateCurrentTimeDisplay() = 0;
   virtual void ToggleTextTrackList() = 0;
   virtual void ShowTextTrackAtIndex(unsigned) = 0;
   virtual void DisableShowingTextTracks() = 0;
   virtual void EnterFullscreen() = 0;
   virtual void ExitFullscreen() = 0;
   virtual void ToggleOverflowMenu() = 0;
   virtual bool OverflowMenuVisible() = 0;
   virtual void OnMediaControlsEnabledChange() = 0;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   Member<HTMLMediaElement> media_element_;
 };
 
 }  // namespace blink
 
 #endif  // MediaControls_h