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

extensions/common/api/_permission_features.json

 // Copyright 2014 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.
 
 // This features file defines permissions for extension APIs implemented
 // under src/extensions.
 
 // See extensions/common/features/* to understand this file, in particular
 // feature.h, simple_feature.h, and base_feature_provider.h.
 
@@ skipping 51 matching lines @@
     },
     {
       "channel": "stable",
       "extension_types": ["extension"],
       "whitelist": [
         "496B6890097EB6E19809ADEADD095A8721FBB2E0",  // FIDO U2F APIs
         "E24F1786D842E91E74C27929B0B3715A4689A473"   // CryptoToken
       ]
     }
   ],
+  "u2fDevices": [
+    {
+      "channel": "dev",
+      "extension_types": ["extension", "platform_app"],
+      "whitelist": [
+        "496B6890097EB6E19809ADEADD095A8721FBB2E0",  // FIDO U2F APIs
+        "E24F1786D842E91E74C27929B0B3715A4689A473",  // CryptoToken
+        "6F9E349A0561C78A0D3F41496FE521C5151C7F71",  // Security Key
+        "C06709A259378015404ED20F75C7D08547E0F10B"   // Security Key (dev)
+      ]
+    }
+  ],
   "power": {
     "channel": "stable",
     "extension_types": [ "extension", "legacy_packaged_app", "platform_app" ]
   },
   // Note: runtime is not actually a permission, but some systems check these
   // values to verify restrictions.
   "runtime": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app", "platform_app"]
   },
@@ skipping 60 matching lines @@
       "extension_types": ["extension"],
       "whitelist": [
         // http://crbug.com/292856
         "3F50C3A83839D9C76334BCE81CDEC06174F266AF",
         "09FDCB5851B8F3378DB630D06E316076E89C95A6",
         "A434B90223C3C52F2B69DB494736B63C612C774D"
       ]
     }
   ]
 }