Keep the mouse cursor within desktop

ui/aura/monitor_change_observer_x11.h

Index: ui/aura/monitor_change_observer_x11.h
diff --git a/ui/aura/monitor_change_observer_x11.h b/ui/aura/monitor_change_observer_x11.h
deleted file mode 100644
index 1c4a323f10f7949c6a4047d5ba739b3b81d1c7ad..0000000000000000000000000000000000000000
--- a/ui/aura/monitor_change_observer_x11.h
+++ /dev/null
@@ -1,44 +0,0 @@
-// 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.
-
-#ifndef UI_AURA_MONITOR_CHANGE_OBSERVER_H
-#define UI_AURA_MONITOR_CHANGE_OBSERVER_H
-#pragma once
-
-#include <X11/Xlib.h>
-
-// Xlib.h defines RootWindow.
-#undef RootWindow
-
-#include "base/basictypes.h"
-#include "ui/aura/aura_export.h"
-
-namespace aura {
-
-// An object that observes changes in monitor configuration and
-// update MonitorManagers.
-class AURA_EXPORT MonitorChangeObserverX11 {
- public:
-  MonitorChangeObserverX11();
-  ~MonitorChangeObserverX11();
-
-  bool Dispatch(const XEvent* event);
-
-  // Reads monitor configurations from the system and notifies
-  // |monitor_manager_| about the change.
-  void NotifyMonitorChange();
-
- private:
-  Display* xdisplay_;
-
-  ::Window x_root_window_;
-
-  int xrandr_event_base_;
-
-  DISALLOW_COPY_AND_ASSIGN(MonitorChangeObserverX11);
-};
-
-}  // namespace aura
-
-#endif  // UI_AURA_MONITOR_CHANGE_OBSERVER_H