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

chrome/browser/extensions/api/file_system/file_system_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.
 
 #include "chrome/browser/extensions/api/file_system/file_system_api.h"
 
 #include <set>
 
 #include "apps/saved_files_service.h"
 #include "base/bind.h"
@@ skipping 425 matching lines @@
     select_file_dialog_->SelectFile(picker_type,
                                     base::string16(),
                                     suggested_name,
                                     &file_type_info,
                                     0,
                                     base::FilePath::StringType(),
                                     owning_window,
                                     NULL);
   }
 
-  virtual ~FilePicker() {}
+  ~FilePicker() override {}
 
  private:
   // 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 {
     std::vector<base::FilePath> paths;
     paths.push_back(path);
     MultiFilesSelected(paths, params);
   }
 
-  virtual void FileSelectedWithExtraInfo(const ui::SelectedFileInfo& file,
-                                         int index,
-                                         void* params) override {
+  void FileSelectedWithExtraInfo(const ui::SelectedFileInfo& file,
+                                 int index,
+                                 void* params) override {
     // Normally, file.local_path is used because it is a native path to the
     // local read-only cached file in the case of remote file system like
     // Chrome OS's Google Drive integration. Here, however, |file.file_path| is
     // necessary because we need to create a FileEntry denoting the remote file,
     // not its cache. On other platforms than Chrome OS, they are the same.
     //
     // TODO(kinaba): remove this, once after the file picker implements proper
     // switch of the path treatment depending on the |support_drive| flag.
     FileSelected(file.file_path, index, params);
   }
 
-  virtual void MultiFilesSelected(const std::vector<base::FilePath>& files,
-                                  void* params) override {
+  void MultiFilesSelected(const std::vector<base::FilePath>& files,
+                          void* params) override {
     function_->FilesSelected(files);
     delete this;
   }
 
-  virtual void MultiFilesSelectedWithExtraInfo(
+  void MultiFilesSelectedWithExtraInfo(
       const std::vector<ui::SelectedFileInfo>& files,
       void* params) override {
     std::vector<base::FilePath> paths;
     for (std::vector<ui::SelectedFileInfo>::const_iterator it = files.begin();
          it != files.end(); ++it) {
       paths.push_back(it->file_path);
     }
     MultiFilesSelected(paths, params);
   }
 
-  virtual void FileSelectionCanceled(void* params) override {
+  void FileSelectionCanceled(void* params) override {
     function_->FileSelectionCanceled();
     delete this;
   }
 
   scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
   scoped_refptr<FileSystemChooseEntryFunction> function_;
 
   DISALLOW_COPY_AND_ASSIGN(FilePicker);
 };
 
@@ skipping 488 matching lines @@
   return false;
 }
 
 bool FileSystemGetObservedEntriesFunction::RunSync() {
   NOTIMPLEMENTED();
   error_ = kUnknownIdError;
   return false;
 }
 
 }  // namespace extensions