Report LatencyInfo through trace buffer

content/browser/renderer_host/input/gesture_event_filter.cc

Index: content/browser/renderer_host/input/gesture_event_filter.cc
diff --git a/content/browser/renderer_host/input/gesture_event_filter.cc b/content/browser/renderer_host/input/gesture_event_filter.cc
index a3b15a7cdc67c8dacea38b6f524dff23e6b66f9c..8639043edd6766a4f1f377cc371ac6d16a1a19c3 100644
--- a/content/browser/renderer_host/input/gesture_event_filter.cc
+++ b/content/browser/renderer_host/input/gesture_event_filter.cc
@@ -251,7 +251,8 @@ bool GestureEventFilter::ShouldForwardForCoalescing(
 }
 
 void GestureEventFilter::ProcessGestureAck(InputEventAckState ack_result,
-                                           WebInputEvent::Type type) {
+                                           WebInputEvent::Type type,
+                                           const ui::LatencyInfo& latency) {
   if (IsGestureEventTypeAsync(type))
     return;
 
@@ -264,7 +265,9 @@ void GestureEventFilter::ProcessGestureAck(InputEventAckState ack_result,
   // Ack'ing an event may enqueue additional gesture events.  By ack'ing the
   // event before the forwarding of queued events below, such additional events
   // can be coalesced with existing queued events prior to dispatch.
-  client_->OnGestureEventAck(GetGestureEventAwaitingAck(), ack_result);
+  GestureEventWithLatencyInfo event_with_latency = GetGestureEventAwaitingAck();
+  event_with_latency.latency.AddNewLatencyFrom(latency);
+  client_->OnGestureEventAck(event_with_latency, ack_result);
 
   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
   if (type == WebInputEvent::GestureFlingCancel) {