Update {virtual,override,final} to follow C++11 style in ui.

ui/display/chromeos/display_configurator.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_CHROMEOS_DISPLAY_CONFIGURATOR_H_
 #define UI_DISPLAY_CHROMEOS_DISPLAY_CONFIGURATOR_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 154 matching lines @@
   // See crbug.com/130188 for initial discussion.
   static const int kVerticalGap = 60;
 
   // Returns the mode within |display| that matches the given size with highest
   // refresh rate. Returns None if no matching display was found.
   static const DisplayMode* FindDisplayModeMatchingSize(
       const DisplaySnapshot& display,
       const gfx::Size& size);
 
   DisplayConfigurator();
-  virtual ~DisplayConfigurator();
+  ~DisplayConfigurator() override;
 
   MultipleDisplayState display_state() const { return current_display_state_; }
   chromeos::DisplayPowerState requested_power_state() const {
     return requested_power_state_;
   }
   const gfx::Size framebuffer_size() const { return framebuffer_size_; }
   const std::vector<DisplayState>& cached_displays() const {
     return cached_displays_;
   }
 
@@ skipping 39 matching lines @@
   // |flags| contains bitwise-or-ed kSetDisplayPower* values. Returns true if
   // the system successfully enters (or was already in) |power_state|.
   void SetDisplayPower(chromeos::DisplayPowerState power_state, int flags);
 
   // Force switching the display mode to |new_state|. Returns false if
   // switching failed (possibly because |new_state| is invalid for the
   // current set of connected displays).
   void SetDisplayMode(MultipleDisplayState new_state);
 
   // NativeDisplayDelegate::Observer overrides:
-  virtual void OnConfigurationChanged() override;
+  void OnConfigurationChanged() override;
 
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   // Sets all the displays into pre-suspend mode; usually this means
   // configure them for their resume state. This allows faster resume on
   // machines where display configuration is slow.
   void SuspendDisplays();
 
   // Reprobes displays to handle changes made while the system was
@@ skipping 153 matching lines @@
 
   // This must be the last variable.
   base::WeakPtrFactory<DisplayConfigurator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DisplayConfigurator);
 };
 
 }  // namespace ui
 
 #endif  // UI_DISPLAY_CHROMEOS_DISPLAY_CONFIGURATOR_H_