Revert of Adding new media controls to MediaNotification

content/public/browser/media_session.h

Index: content/public/browser/media_session.h
diff --git a/content/public/browser/media_session.h b/content/public/browser/media_session.h
index 78a18898d4c8b414e6416a277d490781c9bf5057..9d92b77eaf598ff570fc21347bb87482236ccb48 100644
--- a/content/public/browser/media_session.h
+++ b/content/public/browser/media_session.h
@@ -7,12 +7,6 @@
 
 #include "base/macros.h"
 #include "content/common/content_export.h"
-
-namespace blink {
-namespace mojom {
-enum class MediaSessionAction;
-}  // namespace mojom
-}  // namespace blink
 
 namespace content {
 
@@ -52,9 +46,6 @@
   // |type| represents the origin of the request.
   virtual void Stop(SuspendType suspend_type) = 0;
 
-  // Tell the media session a user action has performed.
-  virtual void DidReceiveAction(blink::mojom::MediaSessionAction action) = 0;
-
  protected:
   MediaSession() = default;
 };