Standardize usage of virtual/override/final specifiers.

ash/shell.cc

 // 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.
 
 #include "ash/shell.h"
 
 #include <algorithm>
 #include <string>
 
 #include "ash/accelerators/accelerator_controller.h"
@@ skipping 137 matching lines @@
 namespace {
 
 using aura::Window;
 using views::Widget;
 
 // A Corewm VisibilityController subclass that calls the Ash animation routine
 // so we can pick up our extended animations. See ash/wm/window_animations.h.
 class AshVisibilityController : public ::wm::VisibilityController {
  public:
   AshVisibilityController() {}
-  virtual ~AshVisibilityController() {}
+  ~AshVisibilityController() override {}
 
  private:
   // Overridden from ::wm::VisibilityController:
-  virtual bool CallAnimateOnChildWindowVisibilityChanged(
-      aura::Window* window,
-      bool visible) override {
+  bool CallAnimateOnChildWindowVisibilityChanged(aura::Window* window,
+                                                 bool visible) override {
     return AnimateOnChildWindowVisibilityChanged(window, visible);
   }
 
   DISALLOW_COPY_AND_ASSIGN(AshVisibilityController);
 };
 
 AshWindowTreeHostInitParams ShellInitParamsToAshWindowTreeHostInitParams(
     const ShellInitParams& shell_init_params) {
   AshWindowTreeHostInitParams ash_init_params;
 #if defined(OS_WIN)
@@ skipping 984 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 // Shell, aura::client::ActivationChangeObserver implementation:
 
 void Shell::OnWindowActivated(aura::Window* gained_active,
                               aura::Window* lost_active) {
   if (gained_active)
     target_root_window_ = gained_active->GetRootWindow();
 }
 
 }  // namespace ash