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..e276adc515a6e1203562c34a50696ac0eed872b7 100644
--- a/content/renderer/mus/compositor_mus_connection.cc
+++ b/content/renderer/mus/compositor_mus_connection.cc
@@ -95,7 +95,7 @@ void CompositorMusConnection::OnConnectionLostOnMainThread() {
 }
 
 void CompositorMusConnection::OnWindowInputEventOnMainThread(
-    ui::ScopedWebInputEvent web_event,
+    blink::ScopedCoalescedWebInputEvent web_event,
     const base::Callback<void(EventResult)>& ack) {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
   RenderWidgetMusConnection* connection =
@@ -186,7 +186,8 @@ void CompositorMusConnection::OnWindowInputEvent(
   // Take ownership of the callback, indicating that we will handle it.
   std::unique_ptr<base::Callback<void(EventResult)>> callback =
       std::move(*ack_callback);
-  ui::ScopedWebInputEvent web_event(Convert(event).release());
+  blink::ScopedCoalescedWebInputEvent web_event(
+      new blink::CoalescedWebInputEvent(Convert(event).release()));
   // TODO(sad): We probably need to plumb LatencyInfo through Mus.
   ui::LatencyInfo info;
   input_handler_manager_->HandleInputEvent(
@@ -199,7 +200,7 @@ void CompositorMusConnection::OnWindowInputEvent(
 void CompositorMusConnection::DidHandleWindowInputEventAndOverscroll(
     std::unique_ptr<base::Callback<void(EventResult)>> ack_callback,
     InputEventAckState ack_state,
-    ui::ScopedWebInputEvent web_event,
+    blink::ScopedCoalescedWebInputEvent web_event,
     const ui::LatencyInfo& latency_info,
     std::unique_ptr<ui::DidOverscrollParams> overscroll_params) {
   // TODO(jonross): We probably need to ack the event based on the consumed
@@ -213,7 +214,7 @@ void CompositorMusConnection::DidHandleWindowInputEventAndOverscroll(
   base::Callback<void(EventResult)> ack =
       base::Bind(&::DoNothingWithEventResult);
   const bool send_ack =
-      ui::WebInputEventTraits::ShouldBlockEventStream(*web_event);
+      ui::WebInputEventTraits::ShouldBlockEventStream(web_event->event());
   if (send_ack) {
     // Ultimately, this ACK needs to go back to the Mus client lib which is not
     // thread-safe and lives on the compositor thread. For ACKs that are passed