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..d78f78ec9b774c6cbc54ceb629aee40ac88d0f7f 100644
--- a/content/browser/media/session/media_session_uma_helper.h
+++ b/content/browser/media/session/media_session_uma_helper.h
@@ -29,6 +29,21 @@ 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();
 
@@ -37,6 +52,8 @@ class CONTENT_EXPORT MediaSessionUmaHelper {
   // Record the result of calling the native requestAudioFocus().
   void RecordRequestAudioFocusResult(bool result) const;
 
+  void RecordMediaSessionUserAction(MediaSessionUserAction action) const;

[mlamouri (slow - plz ping), 2017/04/07 11:15:56]

Could that be static?

[Zhiqiang Zhang (Slow), 2017/04/07 15:12:43]

Done.

+
   void OnSessionActive();
   void OnSessionSuspended();
   void OnSessionInactive();