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

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

Index: third_party/WebKit/Source/core/html/media/MediaControls.h
diff --git a/third_party/WebKit/Source/core/html/media/MediaControls.h b/third_party/WebKit/Source/core/html/media/MediaControls.h
index 4277609080a6860a961532af574b77a380e1ef65..1fe48e7b9fbb0c346065fe257cab5d50938e623f 100644
--- a/third_party/WebKit/Source/core/html/media/MediaControls.h
+++ b/third_party/WebKit/Source/core/html/media/MediaControls.h
@@ -12,9 +12,9 @@
 namespace blink {
 
 class Document;
+class HTMLDivElement;
 class HTMLMediaElement;
 class LayoutObject;
-class MediaControlPanelElement;
 class ShadowRoot;
 
 // MediaControls is an interface to abstract the HTMLMediaElement controls. The
@@ -72,7 +72,7 @@ class CORE_EXPORT MediaControls : public GarbageCollectedMixin {
   // TODO: the following are required by other parts of the media controls

[whywhat, 2017/04/12 15:36:41]

nit: do you need to update the comment (and add your username)?

   // 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;