void RenderWidgetHostImpl::OnAutoscrollFling(const gfx::Vector2dF& velocity) {
  WebGestureEvent event = SyntheticWebGestureEventBuilder::Build(
      WebInputEvent::kGestureFlingStart,
      blink::kWebGestureDeviceSyntheticAutoscroll);
  event.data.fling_start.velocity_x = velocity.x();
  event.data.fling_start.velocity_y = velocity.y();
  event.source_device = blink::kWebGestureDeviceSyntheticAutoscroll;

  input_router_->SendGestureEvent(GestureEventWithLatencyInfo(event));
}

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