Adding static asserts to LatencyInfo struct traits.

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 473de788c5ce0b05c15da9f007c47b5c1d4e7453..f560fb242c3a41c38dc12455200aecaa99bdd8aa 100644
--- a/ui/latency/mojo/latency_info_struct_traits.h
+++ b/ui/latency/mojo/latency_info_struct_traits.h
@@ -11,6 +11,17 @@
 
 namespace mojo {
 
+static_assert(
+    static_cast<int>(
+        ui::mojom::LatencyComponentType::LATENCY_COMPONENT_TYPE_LAST) ==
+        static_cast<int>(ui::LATENCY_COMPONENT_TYPE_LAST),
+    "Enum size mismatch");
+
+static_assert(
+    static_cast<int>(ui::mojom::SourceEventType::SOURCE_EVENT_TYPE_LAST) ==
+        static_cast<int>(ui::SOURCE_EVENT_TYPE_LAST),
+    "Enum size mismatch");
+
 template <>
 struct ArrayTraits<ui::LatencyInfo::LatencyMap> {
   using Element = ui::LatencyInfo::LatencyMap::value_type;