Add whitelisted permission for access to Universal 2nd Factor devices.

extensions/common/permissions/api_permission.h

 // Copyright 2013 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.
 
 #ifndef EXTENSIONS_COMMON_PERMISSIONS_API_PERMISSION_H_
 #define EXTENSIONS_COMMON_PERMISSIONS_API_PERMISSION_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 145 matching lines @@
     kSystemDisplay,
     kSystemStorage,
     kTab,
     kTabCapture,
     kTabCaptureForTab,
     kTerminalPrivate,
     kTopSites,
     kTts,
     kTtsEngine,
     kUnlimitedStorage,
+    kU2fDevices,
     kUsb,
     kUsbDevice,
     kVideoCapture,
     kVirtualKeyboardPrivate,
     kWallpaper,
     kWallpaperPrivate,
     kWebcamPrivate,
     kWebConnectable,  // for externally_connectable manifest key
     kWebNavigation,
     kWebRequest,
@@ skipping 187 matching lines @@
   const char* const name_;
   const int flags_;
   const int l10n_message_id_;
   const PermissionMessage::ID message_id_;
   const APIPermissionConstructor api_permission_constructor_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_PERMISSIONS_API_PERMISSION_H_