Standardize usage of virtual/override/final specifiers.

ash/wm/overview/scoped_transform_overview_window.cc

 // Copyright 2013 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/wm/overview/scoped_transform_overview_window.h"
 
 #include "ash/screen_util.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/overview/scoped_window_copy.h"
 #include "ash/wm/overview/window_selector_item.h"
@@ skipping 18 matching lines @@
  public:
   WindowSelectorAnimationSettings(aura::Window* window) :
       ui::ScopedLayerAnimationSettings(window->layer()->GetAnimator()) {
     SetPreemptionStrategy(
         ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
     SetTransitionDuration(base::TimeDelta::FromMilliseconds(
         ScopedTransformOverviewWindow::kTransitionMilliseconds));
     SetTweenType(gfx::Tween::FAST_OUT_SLOW_IN);
   }
 
-  virtual ~WindowSelectorAnimationSettings() {
-  }
+  ~WindowSelectorAnimationSettings() override {}
 };
 
 void SetTransformOnWindow(aura::Window* window,
                           const gfx::Transform& transform,
                           bool animate) {
   if (animate) {
     WindowSelectorAnimationSettings animation_settings(window);
     window->SetTransform(transform);
   } else {
     window->SetTransform(transform);
@@ skipping 214 matching lines @@
 }
 
 void ScopedTransformOverviewWindow::PrepareForOverview() {
   DCHECK(!overview_started_);
   overview_started_ = true;
   ash::wm::GetWindowState(window_)->set_ignored_by_shelf(true);
   RestoreWindow();
 }
 
 }  // namespace ash