Standardize usage of virtual/override/final specifiers.

ui/app_list/views/folder_header_view.cc

 // Copyright (c) 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/views/folder_header_view.h"
 
 #include <algorithm>
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/app_list/app_list_constants.h"
@@ skipping 28 matching lines @@
   FolderNameView() {
     SetBorder(views::Border::CreateEmptyBorder(1, 1, 1, 1));
     const SkColor kFocusBorderColor = SkColorSetRGB(64, 128, 250);
     SetFocusPainter(views::Painter::CreateSolidFocusPainter(
           kFocusBorderColor,
           gfx::Insets(0, 0, 1, 1)));
 
     SetTextColor(kFolderTitleColor);
   }
 
-  virtual ~FolderNameView() {
-  }
+  ~FolderNameView() override {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FolderNameView);
 };
 
 FolderHeaderView::FolderHeaderView(FolderHeaderViewDelegate* delegate)
     : folder_item_(NULL),
       back_button_(new views::ImageButton(this)),
       folder_name_view_(new FolderNameView),
       folder_name_placeholder_text_(
@@ skipping 169 matching lines @@
 void FolderHeaderView::ButtonPressed(views::Button* sender,
                                      const ui::Event& event) {
   delegate_->NavigateBack(folder_item_, event);
 }
 
 void FolderHeaderView::ItemNameChanged() {
   Update();
 }
 
 }  // namespace app_list