root/chrome/browser/performance_monitor/

[..]
  1. constants.cc
  2. constants.h
  3. database.cc
  4. database.h
  5. database_unittest.cc
  6. event.cc
  7. event.h
  8. event_type.h
  9. key_builder.cc
  10. key_builder.h
  11. metric.cc
  12. metric.h
  13. performance_monitor.cc
  14. performance_monitor.h
  15. performance_monitor_browsertest.cc
  16. performance_monitor_util.cc
  17. performance_monitor_util.h
  18. process_metrics_history.cc
  19. process_metrics_history.h
  20. startup_timer.cc
  21. startup_timer.h
[..]