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

chrome/browser/extensions/api/media_galleries/media_galleries_api.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.
 
 // Implements the Chrome Extensions Media Galleries API.
 
 #include "chrome/browser/extensions/api/media_galleries/media_galleries_api.h"
 
 #include <set>
 #include <string>
@@ skipping 256 matching lines @@
       l10n_util::GetStringUTF16(IDS_MEDIA_GALLERIES_DIALOG_ADD_GALLERY_TITLE),
       default_path,
       NULL,
       0,
       base::FilePath::StringType(),
       platform_util::GetTopLevel(web_contents_->GetNativeView()),
       NULL);
   }
 
   // ui::SelectFileDialog::Listener implementation.
-  virtual void FileSelected(const base::FilePath& path,
-                            int index,
-                            void* params) override {
+  void FileSelected(const base::FilePath& path,
+                    int index,
+                    void* params) override {
     callback_.Run(path);
     Release();  // Balanced in Show().
   }
 
-  virtual void MultiFilesSelected(const std::vector<base::FilePath>& files,
-                                  void* params) override {
+  void MultiFilesSelected(const std::vector<base::FilePath>& files,
+                          void* params) override {
     NOTREACHED() << "Should not be able to select multiple files";
   }
 
-  virtual void FileSelectionCanceled(void* params) override {
+  void FileSelectionCanceled(void* params) override {
     callback_.Run(base::FilePath());
     Release();  // Balanced in Show().
   }
 
  private:
   friend class base::RefCounted<SelectDirectoryDialog>;
-  virtual ~SelectDirectoryDialog() {}
+  ~SelectDirectoryDialog() override {}
 
   scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
   WebContents* web_contents_;
   Callback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(SelectDirectoryDialog);
 };
 
 }  // namespace
 
@@ skipping 962 matching lines @@
       &MediaGalleriesRemoveAllGalleryWatchFunction::OnPreferencesInit, this));
   return true;
 }
 
 void MediaGalleriesRemoveAllGalleryWatchFunction::OnPreferencesInit() {
   gallery_watch_manager()->RemoveAllWatches(GetProfile(), extension_id());
   SendResponse(true);
 }
 
 }  // namespace extensions