WIP Add getCoalescedEvents API using vector of WebInputEvents

content/renderer/input/render_widget_input_handler.cc

Index: content/renderer/input/render_widget_input_handler.cc
diff --git a/content/renderer/input/render_widget_input_handler.cc b/content/renderer/input/render_widget_input_handler.cc
index 264072e85ae3582dc9a4ae9c7b61639eff3a3707..f90348c8575170453878a3bd44fbe382a24fcc50 100644
--- a/content/renderer/input/render_widget_input_handler.cc
+++ b/content/renderer/input/render_widget_input_handler.cc
@@ -190,6 +190,7 @@ RenderWidgetInputHandler::~RenderWidgetInputHandler() {}
 
 void RenderWidgetInputHandler::HandleInputEvent(
     const WebInputEvent& input_event,
+    const std::vector<const WebInputEvent*>& coalescedEvents,
     const ui::LatencyInfo& latency_info,
     InputEventDispatchType dispatch_type) {
   base::AutoReset<bool> handling_input_event_resetter(&handling_input_event_,
@@ -315,7 +316,8 @@ void RenderWidgetInputHandler::HandleInputEvent(
   if (input_event.type != WebInputEvent::Char || !suppress_next_char_events_) {
     suppress_next_char_events_ = false;
     if (processed == WebInputEventResult::NotHandled && widget_->GetWebWidget())
-      processed = widget_->GetWebWidget()->handleInputEvent(input_event);
+      processed = widget_->GetWebWidget()->handleInputEvent(input_event,
+                                                            coalescedEvents);
   }
 
   // TODO(dtapuska): Use the input_event.timeStampSeconds as the start