Rename the remaining usage of Monitor to Display

ui/aura/display_change_observer_x11.h

 // 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_X11_H
-#define UI_AURA_MONITOR_CHANGE_OBSERVER_X11_H
+#ifndef UI_AURA_DISPLAY_CHANGE_OBSERVER_X11_H
+#define UI_AURA_DISPLAY_CHANGE_OBSERVER_X11_H
 #pragma once
 
 #include <X11/Xlib.h>
 
 // Xlib.h defines RootWindow.
 #undef RootWindow
 
 #include "base/basictypes.h"
 #include "base/message_loop.h"
 
 namespace aura {
 namespace internal {
 
-// An object that observes changes in monitor configuration and
-// update MonitorManagers.
-class MonitorChangeObserverX11 : public MessageLoop::Dispatcher {
+// An object that observes changes in display configuration and
+// update DisplayManagers.
+class DisplayChangeObserverX11 : public MessageLoop::Dispatcher {
  public:
-  MonitorChangeObserverX11();
-  virtual ~MonitorChangeObserverX11();
+  DisplayChangeObserverX11();
+  virtual ~DisplayChangeObserverX11();
 
   // Overridden from Dispatcher overrides:
   virtual bool Dispatch(const base::NativeEvent& xev) OVERRIDE;
 
   // Reads display configurations from the system and notifies
-  // |monitor_manager_| about the change.
+  // |display_manager_| about the change.
   void NotifyDisplayChange();
 
  private:
   Display* xdisplay_;
 
   ::Window x_root_window_;
 
   int xrandr_event_base_;
 
-  DISALLOW_COPY_AND_ASSIGN(MonitorChangeObserverX11);
+  DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserverX11);
 };
 
 }  // namespace internal
 }  // namespace aura
 
-#endif  // UI_AURA_MONITOR_CHANGE_OBSERVER_X11_H
+#endif  // UI_AURA_DISPLAY_CHANGE_OBSERVER_X11_H