Remove LatencyInfo::sequence_number. (May break metrics).

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 171 matching lines @@
     case ui::mojom::SourceEventType::OTHER:
       return ui::OTHER;
   }
   NOTREACHED();
   return ui::SourceEventType::UNKNOWN;
 }
 
 }  // namespace
 
 // static
-int64_t StructTraits<ui::mojom::LatencyComponentDataView,
-                     ui::LatencyInfo::LatencyComponent>::
-    sequence_number(const ui::LatencyInfo::LatencyComponent& component) {
-  return component.sequence_number;
-}
-
-// static
 base::TimeTicks StructTraits<ui::mojom::LatencyComponentDataView,
                              ui::LatencyInfo::LatencyComponent>::
     event_time(const ui::LatencyInfo::LatencyComponent& component) {
   return component.event_time;
 }
 
 // static
 uint32_t StructTraits<ui::mojom::LatencyComponentDataView,
                       ui::LatencyInfo::LatencyComponent>::
     event_count(const ui::LatencyInfo::LatencyComponent& component) {
@@ skipping 18 matching lines @@
 bool StructTraits<ui::mojom::LatencyComponentDataView,
                   ui::LatencyInfo::LatencyComponent>::
     Read(ui::mojom::LatencyComponentDataView data,
          ui::LatencyInfo::LatencyComponent* out) {
   if (!data.ReadEventTime(&out->event_time))
     return false;
   if (!data.ReadFirstEventTime(&out->first_event_time))
     return false;
   if (!data.ReadLastEventTime(&out->last_event_time))
     return false;
-  out->sequence_number = data.sequence_number();
   out->event_count = data.event_count();
   return true;
 }
 
 // static
 ui::mojom::LatencyComponentType
 StructTraits<ui::mojom::LatencyComponentIdDataView,
              std::pair<ui::LatencyComponentType, int64_t>>::
     type(const std::pair<ui::LatencyComponentType, int64_t>& id) {
   return UILatencyComponentTypeToMojo(id.first);
@@ skipping 91 matching lines @@
   out->coalesced_ = data.coalesced();
   out->began_ = data.began();
   out->terminated_ = data.terminated();
   out->source_event_type_ = MojoSourceEventTypeToUI(data.source_event_type());
 
   return data.ReadExpectedQueueingTimeOnDispatch(
       &out->expected_queueing_time_on_dispatch_);
 }
 
 }  // namespace mojo