Standardize usage of virtual/override/final in ui/

ui/shell_dialogs/select_file_dialog_mac.mm

 // 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 "ui/shell_dialogs/select_file_dialog.h"
 
 #import <Cocoa/Cocoa.h>
 #include <CoreServices/CoreServices.h>
 
 #include <map>
@@ skipping 46 matching lines @@
 @end
 
 // Implementation of SelectFileDialog that shows Cocoa dialogs for choosing a
 // file or folder.
 class SelectFileDialogImpl : public ui::SelectFileDialog {
  public:
   explicit SelectFileDialogImpl(Listener* listener,
                                 ui::SelectFilePolicy* policy);
 
   // BaseShellDialog implementation.
-  virtual bool IsRunning(gfx::NativeWindow parent_window) const override;
-  virtual void ListenerDestroyed() override;
+  bool IsRunning(gfx::NativeWindow parent_window) const override;
+  void ListenerDestroyed() override;
 
   // Callback from ObjC bridge.
   void FileWasSelected(NSSavePanel* dialog,
                        NSWindow* parent_window,
                        bool was_cancelled,
                        bool is_multi,
                        const std::vector<base::FilePath>& files,
                        int index);
 
  protected:
   // SelectFileDialog implementation.
   // |params| is user data we pass back via the Listener interface.
-  virtual void SelectFileImpl(
-      Type type,
-      const base::string16& title,
-      const base::FilePath& default_path,
-      const FileTypeInfo* file_types,
-      int file_type_index,
-      const base::FilePath::StringType& default_extension,
-      gfx::NativeWindow owning_window,
-      void* params) override;
+  void SelectFileImpl(Type type,
+                      const base::string16& title,
+                      const base::FilePath& default_path,
+                      const FileTypeInfo* file_types,
+                      int file_type_index,
+                      const base::FilePath::StringType& default_extension,
+                      gfx::NativeWindow owning_window,
+                      void* params) override;
 
  private:
-  virtual ~SelectFileDialogImpl();
+  ~SelectFileDialogImpl() override;
 
   // Gets the accessory view for the save dialog.
   NSView* GetAccessoryView(const FileTypeInfo* file_types,
                            int file_type_index);
 
-  virtual bool HasMultipleFileTypeChoicesImpl() override;
+  bool HasMultipleFileTypeChoicesImpl() override;
 
   // The bridge for results from Cocoa to return to us.
   base::scoped_nsobject<SelectFileDialogBridge> bridge_;
 
   // A map from file dialogs to the |params| user data associated with them.
   std::map<NSSavePanel*, void*> params_map_;
 
   // The set of all parent windows for which we are currently running dialogs.
   std::set<NSWindow*> parents_;
 
@@ skipping 313 matching lines @@
 
 namespace ui {
 
 SelectFileDialog* CreateMacSelectFileDialog(
     SelectFileDialog::Listener* listener,
     SelectFilePolicy* policy) {
   return new SelectFileDialogImpl(listener, policy);
 }
 
 }  // namespace ui