Record user interactions with MediaSession by action type

content/browser/media/session/media_session_uma_helper.h

Index: content/browser/media/session/media_session_uma_helper.h
diff --git a/content/browser/media/session/media_session_uma_helper.h b/content/browser/media/session/media_session_uma_helper.h
index 47f8adf51cc7936b0176024240a0c6362280b0df..78f8a30b3147815822a2d62e72499b001ce7dffe 100644
--- a/content/browser/media/session/media_session_uma_helper.h
+++ b/content/browser/media/session/media_session_uma_helper.h
@@ -29,9 +29,26 @@ class CONTENT_EXPORT MediaSessionUmaHelper {
     Count // Leave at the end.
   };
 
+  // Extended enum to blink::mojom::MediaSessionAction, distinguishing default
+  // action handling.
+  enum class MediaSessionUserAction {
+    Play = 0,
+    PlayDefault = 1,
+    Pause = 2,
+    PauseDefault = 3,
+    StopDefault = 4,
+    PreviousTrack = 5,
+    NextTrack = 6,
+    SeekBackward = 7,
+    SeekForward = 8,
+    Count  // Leave at the end.
+  };
+
   MediaSessionUmaHelper();
   ~MediaSessionUmaHelper();
 
+  static void RecordMediaSessionUserAction(MediaSessionUserAction action);
+
   void RecordSessionSuspended(MediaSessionSuspendedSource source) const;
 
   // Record the result of calling the native requestAudioFocus().