Remove old-checkbox-style flag, code and assets

ui/base/ui_base_switches.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 "ui/base/ui_base_switches.h"
 
 namespace switches {
 
 // Disables new menu UI.
 const char kDisableNewMenuStyle[] = "disable-new-menu-style";
@@ skipping 30 matching lines @@
     "highlight-missing-scaled-resources";
 
 // The language file that we want to try to open. Of the form
 // language[-country] where language is the 2 letter code from ISO-639.
 const char kLang[] = "lang";
 
 // Load the locale resources from the given path. When running on Mac/Unix the
 // path should point to a locale.pak file.
 const char kLocalePak[] = "locale_pak";
 
-// Disables the new appearance for checkboxes and radio buttons.
-const char kOldCheckboxStyle[] = "old-checkbox-style";
-
 // Disable ui::MessageBox. This is useful when running as part of scripts that
 // do not have a user interface.
 const char kNoMessageBox[] = "no-message-box";
 
 // Enable support for touch events.
 const char kTouchEvents[] = "touch-events";
 
 // The values the kTouchEvents switch may have, as in --touch-events=disabled.
 //   auto: enabled at startup when an attached touchscreen is present.
 const char kTouchEventsAuto[] = "auto";
@@ skipping 31 matching lines @@
 #endif
 
 #if defined(TOOLKIT_VIEWS) && defined(OS_LINUX)
 // Tells chrome to interpret events from these devices as touch events. Only
 // available with XInput 2 (i.e. X server 1.8 or above). The id's of the
 // devices can be retrieved from 'xinput list'.
 const char kTouchDevices[] = "touch-devices";
 #endif
 
 }  // namespace switches