Standardize usage of virtual/override/final in chrome/browser/extensions/

chrome/browser/extensions/bookmark_app_helper.cc

 // Copyright 2014 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 "chrome/browser/extensions/bookmark_app_helper.h"
 
 #include <cctype>
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/crx_installer.h"
@@ skipping 30 matching lines @@
 namespace {
 
 // Overlays a shortcut icon over the bottom left corner of a given image.
 class GeneratedIconImageSource : public gfx::CanvasImageSource {
  public:
   explicit GeneratedIconImageSource(char letter, SkColor color, int output_size)
       : gfx::CanvasImageSource(gfx::Size(output_size, output_size), false),
         letter_(letter),
         color_(color),
         output_size_(output_size) {}
-  virtual ~GeneratedIconImageSource() {}
+  ~GeneratedIconImageSource() override {}
 
  private:
   // gfx::CanvasImageSource overrides:
-  virtual void Draw(gfx::Canvas* canvas) override {
+  void Draw(gfx::Canvas* canvas) override {
     const unsigned char kLuminanceThreshold = 190;
     const int icon_size = output_size_ * 3 / 4;
     const int icon_inset = output_size_ / 8;
     const size_t border_radius = output_size_ / 16;
     const size_t font_size = output_size_ * 7 / 16;
 
     std::string font_name =
         l10n_util::GetStringUTF8(IDS_SANS_SERIF_FONT_FAMILY);
 #if defined(OS_CHROMEOS)
     const std::string kChromeOSFontFamily = "Noto Sans";
@@ skipping 322 matching lines @@
       extension, info_list, base::Bind(&OnIconsLoaded, web_app_info, callback));
 }
 
 bool IsValidBookmarkAppUrl(const GURL& url) {
   URLPattern origin_only_pattern(Extension::kValidWebExtentSchemes);
   origin_only_pattern.SetMatchAllURLs(true);
   return url.is_valid() && origin_only_pattern.MatchesURL(url);
 }
 
 }  // namespace extensions