input: Make the OverscrollController less intrusive, and some code cleanup.

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index d7e5479b24166de3d073b8a9135f5161a9bf1a46..2b4775847b2490ba758ee1db086d56c2bb343814 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -2178,10 +2178,6 @@ bool RenderWidgetHostImpl::ShouldForwardGestureEvent(
   return input_router_->ShouldForwardGestureEvent(gesture_event);
 }
 
-bool RenderWidgetHostImpl::HasQueuedGestureEvents() const {
-  return input_router_->HasQueuedGestureEvents();
-}
-
 void RenderWidgetHostImpl::StartUserGesture() {
   OnUserGesture();
 }