Adding static asserts to LatencyInfo struct traits.

ui/latency/mojo/latency_info_struct_traits.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_LATENCY_MOJO_LATENCY_INFO_STRUCT_TRAITS_H_
 #define UI_LATENCY_MOJO_LATENCY_INFO_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"
 
 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;
   using Iterator = ui::LatencyInfo::LatencyMap::iterator;
   using ConstIterator = ui::LatencyInfo::LatencyMap::const_iterator;
 
   static ConstIterator GetBegin(const ui::LatencyInfo::LatencyMap& input) {
     return input.begin();
   }
   static Iterator GetBegin(ui::LatencyInfo::LatencyMap& input) {
@@ skipping 63 matching lines @@
   static bool coalesced(const ui::LatencyInfo& info);
   static bool terminated(const ui::LatencyInfo& info);
   static ui::mojom::SourceEventType source_event_type(
       const ui::LatencyInfo& info);
   static bool Read(ui::mojom::LatencyInfoDataView data, ui::LatencyInfo* out);
 };
 
 }  // namespace mojo
 
 #endif  // UI_LATENCY_MOJO_LATENCY_INFO_STRUCT_TRAITS_H_