Move system.* family of APIs to extensions/

chrome/common/extensions/api/system_network.idl

-// 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.
-
-// Use the <code>chrome.system.network</code> API.
-namespace system.network {
-  dictionary NetworkInterface {
-    // The underlying name of the adapter. On *nix, this will typically be
-    // "eth0", "wlan0", etc.
-    DOMString name;
-
-    // The available IPv4/6 address.
-    DOMString address;
-
-    // The prefix length
-    long prefixLength;
-  };
-
-  // Callback from the <code>getNetworkInterfaces</code> method.
-  // |networkInterfaces| : Array of object containing network interfaces
-  // information.
-  callback GetNetworkInterfacesCallback =
-      void (NetworkInterface[] networkInterfaces);
-
-  interface Functions {
-    // Retrieves information about local adapters on this system.
-    // |callback| : Called when local adapter information is available.
-    static void getNetworkInterfaces(GetNetworkInterfacesCallback callback);
-  };
-};