Standardize usage of virtual/override/final specifiers.

ash/wm/overview/window_grid.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 ASH_WM_OVERVIEW_WINDOW_GRID_H_
 #define ASH_WM_OVERVIEW_WINDOW_GRID_H_
 
 #include <vector>
 
 #include "ash/wm/overview/window_selector.h"
@@ skipping 31 matching lines @@
 //    0, 1, 2, 3, 4, 5, 6
 //  - Going "top" to "bottom"
 //    0, 3, 6, 1, 4, 2, 5
 // The selector is switched to the next window grid (if available) or wrapped if
 // it reaches the end of its movement sequence.
 class ASH_EXPORT WindowGrid : public aura::WindowObserver {
  public:
   WindowGrid(aura::Window* root_window,
              const std::vector<aura::Window*>& window_list,
              WindowSelector* window_selector);
-  virtual ~WindowGrid();
+  ~WindowGrid() override;
 
   // Prepares the windows in this grid for overview. This will restore all
   // minimized windows and ensure they are visible.
   void PrepareForOverview();
 
   // Positions all the windows in the grid.
   void PositionWindows(bool animate);
 
   // Updates |selected_index_| according to the specified |direction| and calls
   // MoveSelectionWidget(). Returns |true| if the new selection index is out of
@@ skipping 23 matching lines @@
   bool is_selecting() const { return selection_widget_ != NULL; }
 
   // Returns the root window in which the grid displays the windows.
   const aura::Window* root_window() const { return root_window_; }
 
   const std::vector<WindowSelectorItem*>& window_list() const {
     return window_list_.get();
   }
 
   // aura::WindowObserver:
-  virtual void OnWindowDestroying(aura::Window* window) override;
+  void OnWindowDestroying(aura::Window* window) override;
   // TODO(flackr): Handle window bounds changed in WindowSelectorItem.
-  virtual void OnWindowBoundsChanged(aura::Window* window,
-                                     const gfx::Rect& old_bounds,
-                                     const gfx::Rect& new_bounds) override;
+  void OnWindowBoundsChanged(aura::Window* window,
+                             const gfx::Rect& old_bounds,
+                             const gfx::Rect& new_bounds) override;
 
  private:
   friend class WindowSelectorTest;
 
   // Internal function to initialize the selection widget.
   void InitSelectionWidget(WindowSelector::Direction direction);
 
   // Moves the selection widget to the specified |direction|.
   void MoveSelectionWidget(WindowSelector::Direction direction,
                            bool recreate_selection_widget,
@@ skipping 26 matching lines @@
 
   // Number of columns in the grid.
   size_t num_columns_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowGrid);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_OVERVIEW_WINDOW_GRID_H_