Standardize usage of virtual/override/final specifiers.

ash/system/tray_update.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/system/tray_update.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
@@ skipping 67 matching lines @@
 
     base::string16 label =
         info.factory_reset_required
             ? bundle.GetLocalizedString(
                   IDS_ASH_STATUS_TRAY_RESTART_AND_POWERWASH_TO_UPDATE)
             : bundle.GetLocalizedString(IDS_ASH_STATUS_TRAY_UPDATE);
     AddChildView(new views::Label(label));
     SetAccessibleName(label);
   }
 
-  virtual ~UpdateView() {}
+  ~UpdateView() override {}
 
  private:
   // Overridden from ActionableView.
-  virtual bool PerformAction(const ui::Event& event) override {
+  bool PerformAction(const ui::Event& event) override {
     ash::Shell::GetInstance()->
         system_tray_delegate()->RequestRestartForUpdate();
     return true;
   }
 
   DISALLOW_COPY_AND_ASSIGN(UpdateView);
 };
 
 }
 
 namespace ash {
 namespace tray {
 
 class UpdateNagger : public ui::LayerAnimationObserver {
  public:
   explicit UpdateNagger(SystemTrayItem* owner)
       : owner_(owner) {
     RestartTimer();
     owner_->system_tray()->GetWidget()->GetNativeView()->layer()->
         GetAnimator()->AddObserver(this);
   }
 
-  virtual ~UpdateNagger() {
+  ~UpdateNagger() override {
     StatusAreaWidget* status_area =
         Shell::GetPrimaryRootWindowController()->shelf()->status_area_widget();
     if (status_area) {
       status_area->system_tray()->GetWidget()->GetNativeView()->layer()->
           GetAnimator()->RemoveObserver(this);
     }
   }
 
   void RestartTimer() {
     timer_.Stop();
     timer_.Start(FROM_HERE,
                  base::TimeDelta::FromSeconds(kUpdateNaggingTimeSeconds),
                  this,
                  &UpdateNagger::Nag);
   }
 
  private:
   void Nag() {
     owner_->PopupDetailedView(kShowUpdateNaggerForSeconds, false);
   }
 
   // Overridden from ui::LayerAnimationObserver.
-  virtual void OnLayerAnimationEnded(
-      ui::LayerAnimationSequence* sequence) override {
+  void OnLayerAnimationEnded(ui::LayerAnimationSequence* sequence) override {
     // TODO(oshima): Find out if the updator will be shown on non
     // primary display.
     if (Shell::GetPrimaryRootWindowController()->shelf()->IsVisible())
       timer_.Stop();
     else if (!timer_.IsRunning())
       RestartTimer();
   }
 
-  virtual void OnLayerAnimationAborted(
-      ui::LayerAnimationSequence* sequence) override {}
+  void OnLayerAnimationAborted(ui::LayerAnimationSequence* sequence) override {}
 
-  virtual void OnLayerAnimationScheduled(
+  void OnLayerAnimationScheduled(
       ui::LayerAnimationSequence* sequence) override {}
 
   SystemTrayItem* owner_;
   base::OneShotTimer<UpdateNagger> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdateNagger);
 };
 
 }  // namespace tray
 
@@ skipping 36 matching lines @@
   SetImageFromResourceId(DecideResource(info.severity, false));
   tray_view()->SetVisible(true);
   if (!Shell::GetPrimaryRootWindowController()->shelf()->IsVisible() &&
       !nagger_.get()) {
     // The shelf is not visible, and there is no nagger scheduled.
     nagger_.reset(new tray::UpdateNagger(this));
   }
 }
 
 }  // namespace ash