aura: Gesture event plumbing (skeleton).

ash/wm/window_modality_controller.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/wm/window_modality_controller.h"
 
 #include "ash/wm/window_util.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/event.h"
 #include "ui/aura/window.h"
@@ skipping 54 matching lines @@
   return !!modal_transient_child;
 }
 
 ui::TouchStatus WindowModalityController::PreHandleTouchEvent(
     aura::Window* target,
     aura::TouchEvent* event) {
   // TODO: make touch work with modals.
   return ui::TOUCH_STATUS_UNKNOWN;
 }
 
+ui::GestureStatus WindowModalityController::PreHandleGestureEvent(
+    aura::Window* target,
+    aura::GestureEvent* event) {
+  // TODO: make gestures work with modals.
+  return ui::GESTURE_STATUS_UNKNOWN;
+}
+
 }  // namespace internal
 }  // namespace ash