Standardize usage of virtual/override/final in ui/

ui/app_list/app_list_folder_item.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 "ui/app_list/app_list_folder_item.h"
 
 #include "base/guid.h"
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/app_list_item_list.h"
 #include "ui/gfx/canvas.h"
@@ skipping 11 matching lines @@
  public:
   typedef std::vector<gfx::ImageSkia> Icons;
 
   FolderImageSource(const Icons& icons, const gfx::Size& size)
       : gfx::CanvasImageSource(size, false),
         icons_(icons),
         size_(size) {
     DCHECK(icons.size() <= kNumFolderTopItems);
   }
 
-  virtual ~FolderImageSource() {}
+  ~FolderImageSource() override {}
 
  private:
   void DrawIcon(gfx::Canvas* canvas,
                 const gfx::ImageSkia& icon,
                 const gfx::Size icon_size,
                 int x, int y) {
     if (icon.isNull())
       return;
 
     gfx::ImageSkia resized(
         gfx::ImageSkiaOperations::CreateResizedImage(
             icon, skia::ImageOperations::RESIZE_BEST, icon_size));
     canvas->DrawImageInt(resized, 0, 0, resized.width(), resized.height(),
         x, y, resized.width(), resized.height(), true);
   }
 
   // gfx::CanvasImageSource overrides:
-  virtual void Draw(gfx::Canvas* canvas) override {
+  void Draw(gfx::Canvas* canvas) override {
     // Draw folder circle.
     gfx::Point center = gfx::Point(size().width() / 2 , size().height() / 2);
     SkPaint paint;
     paint.setStyle(SkPaint::kFill_Style);
     paint.setAntiAlias(true);
     paint.setColor(kFolderBubbleColor);
     canvas->DrawCircle(center, size().width() / 2, paint);
 
     if (icons_.size() == 0)
       return;
@@ skipping 176 matching lines @@
   for (size_t i = 0;
        i < kNumFolderTopItems && i < item_list_->item_count(); ++i) {
     AppListItem* item = item_list_->item_at(i);
     item->AddObserver(this);
     top_items_.push_back(item);
   }
   UpdateIcon();
 }
 
 }  // namespace app_list