aura: Gesture event plumbing (skeleton).

ash/wm/modality_event_filter.cc

 // Copyright (c) 2011 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/modality_event_filter.h"
 
 #include "ash/wm/modality_event_filter_delegate.h"
 #include "ui/aura/event.h"
 
 namespace ash {
@@ skipping 18 matching lines @@
   return !delegate_->CanWindowReceiveEvents(target);
 }
 
 ui::TouchStatus ModalityEventFilter::PreHandleTouchEvent(
     aura::Window* target,
     aura::TouchEvent* event) {
   // TODO(sadrul): !
   return ui::TOUCH_STATUS_UNKNOWN;
 }
 
+ui::GestureStatus ModalityEventFilter::PreHandleGestureEvent(
+    aura::Window* target,
+    aura::GestureEvent* event) {
+  // TODO(sad):
+  return ui::GESTURE_STATUS_UNKNOWN;
+}
+
 }  // namespace internal
 }  // namespace ash