WIP Add getCoalescedEvents API using vector of WebInputEvents

components/test_runner/event_sender.cc

Index: components/test_runner/event_sender.cc
diff --git a/components/test_runner/event_sender.cc b/components/test_runner/event_sender.cc
index f56555d59b52d4806a36224407800451fca50b0e..5b0904cb67458fadf6c56dadf87db974a4553fec 100644
--- a/components/test_runner/event_sender.cc
+++ b/components/test_runner/event_sender.cc
@@ -2807,7 +2807,8 @@ WebInputEventResult EventSender::HandleInputEventOnViewOrPopup(
         raw_event, delegate()->GetWindowToViewportScale());
     const WebInputEvent* popup_friendly_event =
         scaled_event.get() ? scaled_event.get() : &raw_event;
-    return popup->handleInputEvent(*popup_friendly_event);
+    return popup->handleInputEvent(*popup_friendly_event,
+                                   std::vector<const WebInputEvent*>());
   }
 
   std::unique_ptr<WebInputEvent> widget_event =
@@ -2815,7 +2816,8 @@ WebInputEventResult EventSender::HandleInputEventOnViewOrPopup(
   const WebInputEvent* event =
       widget_event.get() ? static_cast<WebMouseEvent*>(widget_event.get())
                          : &raw_event;
-  return widget()->handleInputEvent(*event);
+  return widget()->handleInputEvent(*event,
+                                    std::vector<const WebInputEvent*>());
 }
 
 void EventSender::SendGesturesForMouseWheelEvent(