aura: Gesture event plumbing (skeleton).

ui/views/widget/native_widget_aura.cc

Index: ui/views/widget/native_widget_aura.cc
diff --git a/ui/views/widget/native_widget_aura.cc b/ui/views/widget/native_widget_aura.cc
index 16c1d7a82d8797e3e9363395acf4a6bf3d70b511..f9973444decc395200a5fdc98a0cd93a618a9f7a 100644
--- a/ui/views/widget/native_widget_aura.cc
+++ b/ui/views/widget/native_widget_aura.cc
@@ -673,6 +673,12 @@ ui::TouchStatus NativeWidgetAura::OnTouchEvent(aura::TouchEvent* event) {
   return delegate_->OnTouchEvent(touch_event);
 }
 
+ui::GestureStatus NativeWidgetAura::OnGestureEvent(aura::GestureEvent* event) {
+  DCHECK(window_->IsVisible());
+  // TODO(sad):
+  return ui::GESTURE_STATUS_UNKNOWN;
+}
+
 bool NativeWidgetAura::CanFocus() {
   return can_activate_;
 }