Rename gfx::Display to display::Display

ui/display/display_change_notifier.h

 // Copyright 2014 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_DISPLAY_DISPLAY_CHANGE_NOTIFIER_H_
 #define UI_DISPLAY_DISPLAY_CHANGE_NOTIFIER_H_
 
 #include <vector>
 
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "ui/display/display_export.h"
 
-namespace gfx {
+namespace display {
 class Display;
-}
-
-namespace display {
-using Display = gfx::Display;
 class DisplayObserver;
 
 // DisplayChangeNotifier is a class implementing the handling of DisplayObserver
 // notification for Screen.
 class DISPLAY_EXPORT DisplayChangeNotifier {
  public:
   DisplayChangeNotifier();
   ~DisplayChangeNotifier();
 
   void AddObserver(DisplayObserver* observer);
 
   void RemoveObserver(DisplayObserver* observer);
 
   void NotifyDisplaysChanged(const std::vector<Display>& old_displays,
                              const std::vector<Display>& new_displays);
 
  private:
   // The observers that need to be notified when a display is modified, added
   // or removed.
   base::ObserverList<DisplayObserver> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(DisplayChangeNotifier);
 };
 
 }  // namespace display
 
 #endif  // UI_DISPLAY_DISPLAY_CHANGE_NOTIFIER_H_