diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index 4f65dd8..146f433 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -156,6 +156,10 @@
     "metrics/compositor_frame_reporting_controller.h",
     "metrics/compositor_timing_history.cc",
     "metrics/compositor_timing_history.h",
+    "metrics/event_metrics.cc",
+    "metrics/event_metrics.h",
+    "metrics/events_metrics_manager.cc",
+    "metrics/events_metrics_manager.h",
     "metrics/frame_sequence_tracker.cc",
     "metrics/frame_sequence_tracker.h",
     "metrics/latency_ukm_reporter.cc",
@@ -647,6 +651,7 @@
     "metrics/compositor_frame_reporter_unittest.cc",
     "metrics/compositor_frame_reporting_controller_unittest.cc",
     "metrics/compositor_timing_history_unittest.cc",
+    "metrics/events_metrics_manager_unittest.cc",
     "metrics/frame_sequence_metrics_unittest.cc",
     "metrics/frame_sequence_tracker_unittest.cc",
     "mojo_embedder/async_layer_tree_frame_sink_unittest.cc",