Collapse the API surface on WebInputEvent via accessor functions.

ui/events/blink/input_scroll_elasticity_controller.cc

Index: ui/events/blink/input_scroll_elasticity_controller.cc
diff --git a/ui/events/blink/input_scroll_elasticity_controller.cc b/ui/events/blink/input_scroll_elasticity_controller.cc
index 744c1bcf24745f661ed5d26eaa272852bf7cfd0f..dea30df2ad4ea2c13ce169600beba81574ae9e25 100644
--- a/ui/events/blink/input_scroll_elasticity_controller.cc
+++ b/ui/events/blink/input_scroll_elasticity_controller.cc
@@ -111,9 +111,9 @@ void InputScrollElasticityController::ObserveGestureEventAndResult(
     const cc::InputHandlerScrollResult& scroll_result) {
   base::TimeTicks event_timestamp =
       base::TimeTicks() +
-      base::TimeDelta::FromSecondsD(gesture_event.timeStampSeconds);
+      base::TimeDelta::FromSecondsD(gesture_event.timeStampSeconds());
 
-  switch (gesture_event.type) {
+  switch (gesture_event.type()) {
     case blink::WebInputEvent::GestureScrollBegin: {
       if (gesture_event.data.scrollBegin.synthetic)
         return;