diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index 7e1189f..da22f50 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -679,6 +679,7 @@
     "metrics/compositor_frame_reporter_unittest.cc",
     "metrics/compositor_frame_reporting_controller_unittest.cc",
     "metrics/compositor_timing_history_unittest.cc",
+    "metrics/dropped_frame_counter_unittest.cc",
     "metrics/events_metrics_manager_unittest.cc",
     "metrics/frame_sequence_metrics_unittest.cc",
     "metrics/frame_sequence_tracker_unittest.cc",