This adds a private extension API to use for simple networking

chrome/common/extensions/permissions/api_permission.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 "chrome/common/extensions/permissions/api_permission.h"
 
 #include "chrome/common/extensions/permissions/bluetooth_device_permission.h"
 #include "chrome/common/extensions/permissions/media_galleries_permission.h"
 #include "chrome/common/extensions/permissions/permissions_info.h"
 #include "chrome/common/extensions/permissions/socket_permission.h"
@@ skipping 235 matching lines @@
       kFlagCannotBeOptional },
     { APIPermission::kChromeosInfoPrivate, "chromeosInfoPrivate",
       kFlagCannotBeOptional },
     { APIPermission::kDeveloperPrivate, "developerPrivate",
       kFlagCannotBeOptional },
     { APIPermission::kDial, "dial", kFlagCannotBeOptional },
     { APIPermission::kFileBrowserHandlerInternal, "fileBrowserHandlerInternal",
       kFlagCannotBeOptional },
     { APIPermission::kFileBrowserPrivate, "fileBrowserPrivate",
       kFlagCannotBeOptional },
+    { APIPermission::kNetworkingPrivate, "networkingPrivate",
+      kFlagCannotBeOptional },
     { APIPermission::kManagedModePrivate, "managedModePrivate",
       kFlagCannotBeOptional },
     { APIPermission::kMediaPlayerPrivate, "mediaPlayerPrivate",
       kFlagCannotBeOptional },
     { APIPermission::kMetricsPrivate, "metricsPrivate",
       kFlagCannotBeOptional },
     { APIPermission::kSystemPrivate, "systemPrivate",
       kFlagCannotBeOptional },
     { APIPermission::kCloudPrintPrivate, "cloudPrintPrivate",
       kFlagCannotBeOptional },
@@ skipping 94 matching lines @@
         pr.flags,
         pr.constructor);
   }
 
   // Register aliases.
   info->RegisterAlias("unlimitedStorage", kOldUnlimitedStoragePermission);
   info->RegisterAlias("tabs", kWindowsPermission);
 }
 
 }  // namespace extensions