Record accuracy of expected queueing time metric.

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 "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"
 
 namespace mojo {
 
 static_assert(
     static_cast<int>(
         ui::mojom::LatencyComponentType::LATENCY_COMPONENT_TYPE_LAST) ==
         static_cast<int>(ui::LATENCY_COMPONENT_TYPE_LAST),
@@ skipping 74 matching lines @@
 template <>
 struct StructTraits<ui::mojom::LatencyInfoDataView, ui::LatencyInfo> {
   static const std::string& trace_name(const ui::LatencyInfo& info);
   static const ui::LatencyInfo::LatencyMap& latency_components(
       const ui::LatencyInfo& info);
   static int64_t trace_id(const ui::LatencyInfo& info);
   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 base::TimeDelta expected_queueing_time_on_dispatch(
+      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_