WIP Add getCoalescedEvents API using vector of WebInputEvents

content/renderer/mus/compositor_mus_connection.cc

Index: content/renderer/mus/compositor_mus_connection.cc
diff --git a/content/renderer/mus/compositor_mus_connection.cc b/content/renderer/mus/compositor_mus_connection.cc
index e888e10fdaa26eb41e0de405ab492b00602167b2..7475e1d6623ec36d97be936add04edfe61200bd3 100644
--- a/content/renderer/mus/compositor_mus_connection.cc
+++ b/content/renderer/mus/compositor_mus_connection.cc
@@ -96,6 +96,7 @@ void CompositorMusConnection::OnConnectionLostOnMainThread() {
 
 void CompositorMusConnection::OnWindowInputEventOnMainThread(
     ui::ScopedWebInputEvent web_event,
+    const std::vector<const blink::WebInputEvent*>& coalescedEvents,
     const base::Callback<void(EventResult)>& ack) {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
   RenderWidgetMusConnection* connection =
@@ -104,7 +105,7 @@ void CompositorMusConnection::OnWindowInputEventOnMainThread(
     ack.Run(EventResult::UNHANDLED);
     return;
   }
-  connection->OnWindowInputEvent(std::move(web_event), ack);
+  connection->OnWindowInputEvent(std::move(web_event), coalescedEvents, ack);
 }
 
 void CompositorMusConnection::OnWindowInputEventAckOnMainThread(
@@ -187,10 +188,12 @@ void CompositorMusConnection::OnWindowInputEvent(
   std::unique_ptr<base::Callback<void(EventResult)>> callback =
       std::move(*ack_callback);
   ui::ScopedWebInputEvent web_event(Convert(event).release());
-  // TODO(sad): We probably need to plumb LatencyInfo through Mus.
+  // TODO(sad): We probably need to plumb LatencyInfo and coalescedEvents
+  // through Mus.
   ui::LatencyInfo info;
+  std::vector<const blink::WebInputEvent*> coalescedEvents;
   input_handler_manager_->HandleInputEvent(
-      routing_id_, std::move(web_event), info,
+      routing_id_, std::move(web_event), coalescedEvents, info,
       base::Bind(
           &CompositorMusConnection::DidHandleWindowInputEventAndOverscroll,
           this, base::Passed(std::move(callback))));
@@ -232,7 +235,8 @@ void CompositorMusConnection::DidHandleWindowInputEventAndOverscroll(
   main_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&CompositorMusConnection::OnWindowInputEventOnMainThread, this,
-                 base::Passed(std::move(web_event)), ack));
+                 base::Passed(std::move(web_event)),
+                 std::vector<const blink::WebInputEvent*>(), ack));
 }
 
 }  // namespace content