Keep track of coalesced events in main thread event queue

content/renderer/render_view_impl.cc

 // Copyright (c) 2012 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/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <memory>
 
@@ skipping 2697 matching lines @@
     webview()->setZoomFactorForDeviceScaleFactor(device_scale_factor_);
   } else {
     webview()->setDeviceScaleFactor(device_scale_factor_);
   }
   webview()->settings()->setPreferCompositingToLCDTextEnabled(
       PreferCompositingToLCDText(compositor_deps_, device_scale_factor_));
 }
 
 void RenderViewImpl::OnDiscardInputEvent(
     const blink::WebInputEvent* input_event,
+    const std::vector<const blink::WebInputEvent*>& coalesced_events,
     const ui::LatencyInfo& latency_info,
     InputEventDispatchType dispatch_type) {
   if (!input_event || (dispatch_type != DISPATCH_TYPE_BLOCKING &&
                        dispatch_type != DISPATCH_TYPE_BLOCKING_NOTIFY_MAIN)) {
     return;
   }
 
   if (dispatch_type == DISPATCH_TYPE_BLOCKING_NOTIFY_MAIN) {
     NotifyInputEventHandled(input_event->type(),
                             INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
   }
 
   std::unique_ptr<InputEventAck> ack(
       new InputEventAck(InputEventAckSource::MAIN_THREAD, input_event->type(),
                         INPUT_EVENT_ACK_STATE_NOT_CONSUMED));
   OnInputEventAck(std::move(ack));
 }
 
 }  // namespace content