root/content/browser/tracing/

1. etw_system_event_consumer_win.cc
2. etw_system_event_consumer_win.h
3. trace_message_filter.cc
4. trace_message_filter.h
5. tracing_controller_browsertest.cc
6. tracing_controller_impl.cc
7. tracing_controller_impl.h
8. tracing_ui.cc
9. tracing_ui.h