Collapse the API surface on WebInputEvent via accessor functions.

ui/events/blink/compositor_thread_event_queue.cc

Index: ui/events/blink/compositor_thread_event_queue.cc
diff --git a/ui/events/blink/compositor_thread_event_queue.cc b/ui/events/blink/compositor_thread_event_queue.cc
index 47e906f98a532e65cb4bf52b52bf6c7829127b89..5083d35d1383c43cd4c818321be1a62f4cf0bcf9 100644
--- a/ui/events/blink/compositor_thread_event_queue.cc
+++ b/ui/events/blink/compositor_thread_event_queue.cc
@@ -17,7 +17,7 @@ CompositorThreadEventQueue::~CompositorThreadEventQueue() {}
 void CompositorThreadEventQueue::Queue(
     std::unique_ptr<EventWithCallback> new_event,
     base::TimeTicks timestamp_now) {
-  if (queue_.empty() || !IsContinuousGestureEvent(new_event->event().type) ||
+  if (queue_.empty() || !IsContinuousGestureEvent(new_event->event().type()) ||
       !IsCompatibleScrollorPinch(ToWebGestureEvent(new_event->event()),
                                  ToWebGestureEvent(queue_.back()->event()))) {
     queue_.emplace_back(std::move(new_event));