Standardize usage of virtual/override/final specifiers.

ash/system/tray/tray_background_view.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/tray_background_view.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/screen_util.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_widget.h"
@@ skipping 53 matching lines @@
 const char TrayBackgroundView::kViewClassName[] = "tray/TrayBackgroundView";
 
 // Used to track when the anchor widget changes position on screen so that the
 // bubble position can be updated.
 class TrayBackgroundView::TrayWidgetObserver : public views::WidgetObserver {
  public:
   explicit TrayWidgetObserver(TrayBackgroundView* host)
       : host_(host) {
   }
 
-  virtual void OnWidgetBoundsChanged(views::Widget* widget,
-                                     const gfx::Rect& new_bounds) override {
+  void OnWidgetBoundsChanged(views::Widget* widget,
+                             const gfx::Rect& new_bounds) override {
     host_->AnchorUpdated();
   }
 
-  virtual void OnWidgetVisibilityChanged(views::Widget* widget,
-                                         bool visible) override {
+  void OnWidgetVisibilityChanged(views::Widget* widget, bool visible) override {
     host_->AnchorUpdated();
   }
 
  private:
   TrayBackgroundView* host_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayWidgetObserver);
 };
 
 class TrayBackground : public views::Background {
@@ skipping 52 matching lines @@
     leading_images_[kImageVertical][kImageTypePressed] =
         rb.GetImageNamed(IDR_AURA_TRAY_BG_VERTICAL_TOP_PRESSED).ToImageSkia();
     middle_images_[kImageVertical][kImageTypePressed] =
         rb.GetImageNamed(
             IDR_AURA_TRAY_BG_VERTICAL_CENTER_PRESSED).ToImageSkia();
     trailing_images_[kImageVertical][kImageTypePressed] =
         rb.GetImageNamed(
             IDR_AURA_TRAY_BG_VERTICAL_BOTTOM_PRESSED).ToImageSkia();
   }
 
-  virtual ~TrayBackground() {}
+  ~TrayBackground() override {}
 
   SkColor color() { return color_; }
   void set_color(SkColor color) { color_ = color; }
   void set_alpha(int alpha) { color_ = SkColorSetARGB(alpha, 0, 0, 0); }
 
  private:
   ShelfWidget* GetShelfWidget() const {
     return RootWindowController::ForWindow(tray_background_view_->
         status_area_widget()->GetNativeWindow())->shelf();
   }
 
   // Overridden from views::Background.
-  virtual void Paint(gfx::Canvas* canvas, views::View* view) const override {
+  void Paint(gfx::Canvas* canvas, views::View* view) const override {
     int orientation = kImageHorizontal;
     ShelfWidget* shelf_widget = GetShelfWidget();
     if (shelf_widget &&
         !shelf_widget->shelf_layout_manager()->IsHorizontalAlignment())
       orientation = kImageVertical;
 
     int state = kImageTypeDefault;
     if (tray_background_view_->draw_background_as_active())
       state = kImageTypePressed;
     else if (shelf_widget && shelf_widget->GetDimsShelf())
@@ skipping 480 matching lines @@
     background_->set_alpha(kTrayBackgroundAlpha);
   SchedulePaint();
 }
 
 void TrayBackgroundView::UpdateBubbleViewArrow(
     views::TrayBubbleView* bubble_view) {
   // Nothing to do here.
 }
 
 }  // namespace ash