Keep track of coalesced events in main thread event queue

content/browser/renderer_host/input/input_router_impl.cc

 // Copyright 2013 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/browser/renderer_host/input/input_router_impl.h"
 
 #include <math.h>
 
 #include <utility>
 
@@ skipping 410 matching lines @@
                  .data.flingStart.velocityY != 0.0);
 
   // This conversion is temporary. WebInputEvent should be generated
   // directly from ui::Event with the viewport coordinates. See
   // crbug.com/563730.
   std::unique_ptr<blink::WebInputEvent> event_in_viewport =
       ui::ScaleWebInputEvent(input_event, device_scale_factor_);
   const WebInputEvent* event_to_send =
       event_in_viewport ? event_in_viewport.get() : &input_event;
 
-  if (Send(new InputMsg_HandleInputEvent(routing_id(), event_to_send,
-                                         latency_info, dispatch_type))) {
+  if (Send(new InputMsg_HandleInputEvent(
+          routing_id(), event_to_send, std::vector<IPC::WebInputEventPointer>(),
+          latency_info, dispatch_type))) {
     // Ack messages for ignored ack event types should never be sent by the
     // renderer. Consequently, such event types should not affect event time
     // or in-flight event count metrics.
     if (dispatch_type == InputEventDispatchType::DISPATCH_TYPE_BLOCKING)
       client_->IncrementInFlightEventCount(input_event.type());
     return true;
   }
   return false;
 }
 
@@ skipping 187 matching lines @@
 
   flush_requested_ = false;
   client_->DidFlush();
 }
 
 void InputRouterImpl::SetFrameTreeNodeId(int frameTreeNodeId) {
   frame_tree_node_id_ = frameTreeNodeId;
 }
 
 }  // namespace content