Record accuracy of expected queueing time metric.

ui/latency/mojo/latency_info_struct_traits.h

Index: ui/latency/mojo/latency_info_struct_traits.h
diff --git a/ui/latency/mojo/latency_info_struct_traits.h b/ui/latency/mojo/latency_info_struct_traits.h
index 0084adc5e8a344b8038c98853b0d244caf2a2a52..b6b5edc7f1e6dae4e53e74d30174b1614fef89a1 100644
--- a/ui/latency/mojo/latency_info_struct_traits.h
+++ b/ui/latency/mojo/latency_info_struct_traits.h
@@ -5,6 +5,7 @@
 #ifndef UI_LATENCY_MOJO_LATENCY_INFO_STRUCT_TRAITS_H_
 #define UI_LATENCY_MOJO_LATENCY_INFO_STRUCT_TRAITS_H_
 
+#include "mojo/common/common_custom_types_struct_traits.h"
 #include "ui/gfx/geometry/mojo/geometry_struct_traits.h"
 #include "ui/latency/latency_info.h"
 #include "ui/latency/mojo/latency_info.mojom-shared.h"
@@ -100,6 +101,8 @@ struct StructTraits<ui::mojom::LatencyInfoDataView, ui::LatencyInfo> {
   static bool terminated(const ui::LatencyInfo& info);
   static ui::mojom::SourceEventType source_event_type(
       const ui::LatencyInfo& info);
+  static base::TimeDelta expected_queueing_time_on_dispatch(
+      const ui::LatencyInfo& info);
   static bool Read(ui::mojom::LatencyInfoDataView data, ui::LatencyInfo* out);
 };