Record accuracy of expected queueing time metric.

ui/latency/mojo/latency_info_struct_traits.cc

 // 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.
 
 #include "ui/latency/mojo/latency_info_struct_traits.h"
 
 #include "ipc/ipc_message_utils.h"
 
 namespace mojo {
 
@@ skipping 286 matching lines @@
 }
 
 // static
 ui::mojom::SourceEventType
 StructTraits<ui::mojom::LatencyInfoDataView,
              ui::LatencyInfo>::source_event_type(const ui::LatencyInfo& info) {
   return UISourceEventTypeToMojo(info.source_event_type());
 }
 
 // static
+base::TimeDelta StructTraits<ui::mojom::LatencyInfoDataView, ui::LatencyInfo>::
+    expected_queueing_time_on_dispatch(const ui::LatencyInfo& info) {
+  return info.expected_queueing_time_on_dispatch();
+}
+
+// static
 bool StructTraits<ui::mojom::LatencyInfoDataView, ui::LatencyInfo>::Read(
     ui::mojom::LatencyInfoDataView data,
     ui::LatencyInfo* out) {
   if (!data.ReadTraceName(&out->trace_name_))
     return false;
 
   mojo::ArrayDataView<ui::mojom::LatencyComponentPairDataView> components;
   data.GetLatencyComponentsDataView(&components);
   for (uint32_t i = 0; i < components.size(); ++i) {
     ui::mojom::LatencyComponentPairDataView component_pair;
     components.GetDataView(i, &component_pair);
     ui::LatencyInfo::LatencyMap::key_type key;
     if (!component_pair.ReadKey(&key))
       return false;
     auto& value = out->latency_components_[key];
     if (!component_pair.ReadValue(&value))
       return false;
   }
 
   out->trace_id_ = data.trace_id();
   out->coalesced_ = data.coalesced();
   out->terminated_ = data.terminated();
   out->source_event_type_ = MojoSourceEventTypeToUI(data.source_event_type());
-  return true;
+
+  return data.ReadExpectedQueueingTimeOnDispatch(
+      &out->expected_queueing_time_on_dispatch_);
 }
 
 }  // namespace mojo