Keep track of coalesced events in main thread event queue

content/renderer/mus/render_widget_mus_connection.cc

Index: content/renderer/mus/render_widget_mus_connection.cc
diff --git a/content/renderer/mus/render_widget_mus_connection.cc b/content/renderer/mus/render_widget_mus_connection.cc
index 24594cbbaabd97bf321ea7e6f689b70ce10b23eb..83d851f2790c901891b924f639e6dcc24bd37638 100644
--- a/content/renderer/mus/render_widget_mus_connection.cc
+++ b/content/renderer/mus/render_widget_mus_connection.cc
@@ -173,8 +173,8 @@ void RenderWidgetMusConnection::OnWindowInputEvent(
   pending_ack_ = ack;
   // TODO(fsamuel, sadrul): Track real latency info.
   ui::LatencyInfo latency_info;
-  input_handler_->HandleInputEvent(*input_event, latency_info,
-                                   DISPATCH_TYPE_BLOCKING);
+  input_handler_->HandleInputEvent(blink::WebCoalescedInputEvent(*input_event),
+                                   latency_info, DISPATCH_TYPE_BLOCKING);
 }
 
 }  // namespace content