diff --git a/tools/gn/bootstrap/bootstrap.py b/tools/gn/bootstrap/bootstrap.py
index b6a113d..749ee36 100755
--- a/tools/gn/bootstrap/bootstrap.py
+++ b/tools/gn/bootstrap/bootstrap.py
@@ -504,7 +504,6 @@
       'base/trace_event/trace_event_synthetic_delay.cc',
       'base/trace_event/trace_log.cc',
       'base/trace_event/trace_log_constants.cc',
-      'base/trace_event/trace_sampling_thread.cc',
       'base/trace_event/tracing_agent.cc',
       'base/tracked_objects.cc',
       'base/tracking_info.cc',