Add logging to remote commands

ui/base/user_activity/user_activity_detector.h

Index: ui/base/user_activity/user_activity_detector.h
diff --git a/ui/base/user_activity/user_activity_detector.h b/ui/base/user_activity/user_activity_detector.h
index a480bedd28ecd58557ee1ee64755e37d3b3e0062..f2f68897175bac509db84993e54c19348188e66e 100644
--- a/ui/base/user_activity/user_activity_detector.h
+++ b/ui/base/user_activity/user_activity_detector.h
@@ -34,6 +34,7 @@ class UI_BASE_EXPORT UserActivityDetector : public ui::PlatformEventObserver {
   static UserActivityDetector* Get();
 
   base::TimeTicks last_activity_time() const { return last_activity_time_; }
+  std::string last_activity_name() const { return last_activity_name_; }
 
   void set_now_for_test(base::TimeTicks now) { now_for_test_ = now; }
 
@@ -67,6 +68,9 @@ class UI_BASE_EXPORT UserActivityDetector : public ui::PlatformEventObserver {
   // Last time at which user activity was observed.
   base::TimeTicks last_activity_time_;
 
+  // Name of the last user activity event.
+  std::string last_activity_name_;
+
   // Last time at which we notified observers that the user was active.
   base::TimeTicks last_observer_notification_time_;