Record accuracy of expected queueing time metric.

content/renderer/input/render_widget_input_handler.cc

 // Copyright 2015 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 "content/renderer/input/render_widget_input_handler.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 
@@ skipping 229 matching lines @@
                          TRACE_EVENT_FLAG_FLOW_IN | TRACE_EVENT_FLAG_FLOW_OUT,
                          "step", "HandleInputEventMain");
 
   // If we don't have a high res timer, these metrics won't be accurate enough
   // to be worth collecting. Note that this does introduce some sampling bias.
   if (!start_time.is_null())
     LogInputEventLatencyUma(input_event, start_time);
 
   std::unique_ptr<cc::SwapPromiseMonitor> latency_info_swap_promise_monitor;
   ui::LatencyInfo swap_latency_info(latency_info);
+
+  if (RenderThreadImpl::current()) {
+    swap_latency_info.set_expected_queueing_time_on_dispatch(
+        RenderThreadImpl::current()
+            ->GetRendererScheduler()
+            ->MostRecentExpectedQueueingTime());
+  }
+
   swap_latency_info.AddLatencyNumber(
       ui::LatencyComponentType::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0,
       0);
   if (widget_->compositor()) {
     latency_info_swap_promise_monitor =
         widget_->compositor()->CreateLatencyInfoSwapPromiseMonitor(
             &swap_latency_info);
   }
 
   bool prevent_default = false;
@@ skipping 180 matching lines @@
   // it can be bundled in the event ack.
   if (handling_event_overscroll_) {
     *handling_event_overscroll_ = std::move(params);
     return;
   }
 
   delegate_->OnDidOverscroll(*params);
 }
 
 }  // namespace content