aura: Gesture event plumbing (skeleton).

ash/wm/root_window_event_filter.cc

Index: ash/wm/root_window_event_filter.cc
diff --git a/ash/wm/root_window_event_filter.cc b/ash/wm/root_window_event_filter.cc
index 7ed9ed88abeb4bc3b4702990d930162e93e46087..564033f604b9e4378f8ef03c6c38f1768c86a45b 100644
--- a/ash/wm/root_window_event_filter.cc
+++ b/ash/wm/root_window_event_filter.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -109,6 +109,13 @@ ui::TouchStatus RootWindowEventFilter::PreHandleTouchEvent(
   return ui::TOUCH_STATUS_UNKNOWN;
 }
 
+ui::GestureStatus RootWindowEventFilter::PreHandleGestureEvent(
+    aura::Window* target,
+    aura::GestureEvent* event) {
+  // TODO(sad):
+  return ui::GESTURE_STATUS_UNKNOWN;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // RootWindowEventFilter, private: