[Service Worker Registration] Registered extension scheme to allow service workers

extensions/common/api/_behavior_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 switches used to control Extension behaviour,
 // typically whitelist configuration.
 //
 // See extensions/common/features/* to understand this file, in particular
 // feature.h, simple_feature.h, and base_feature_provider.h.
 //
@@ skipping 10 matching lines @@
   "bluetooth.peripheral": {
     "channel": "stable",
     "extension_types": ["platform_app"],
     "platforms": ["chromeos"],
     "whitelist": [
       "307E96539209F95A1A8740C713E6998A73657D96",  // http://crbug.com/485292
       "81986D4F846CEDDDB962643FA501D1780DD441BB",  // http://crbug.com/485292
       "9E287A8257E58EFB13E89C86A4B75A3AC4B058D8"   // http://crbug.com/485292
     ]
   },
+  "service_worker": {
+    "channel": "trunk"
+  },
   "whitelisted_for_incognito": {
     "channel": "stable",
     "extension_types": "all",
     // This is "external_component" for legacy reasons; it should be
     // unnecessary given there's a whitelist.
     "location": "external_component",
     "whitelist": [
       "D5736E4B5CF695CB93A2FB57E4FDC6E5AFAB6FE2",  // http://crbug.com/312900
       "D57DE394F36DC1C3220E7604C575D29C51A6C495",  // http://crbug.com/319444
       "3F65507A3B39259B38C8173C6FFA3D12DF64CCE9"   // http://crbug.com/371562
     ]
   }
 }