[Extensions] Convert APIs to use movable types [9]

chrome/common/extensions/api/signed_in_devices.idl

 // Copyright (c) 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.signedInDevices</code> API to get a list of devices
 // signed into chrome with the same account as the current profile.
-namespace signedInDevices {
+[use_movable_types=true] namespace signedInDevices {
   enum OS {
     win,
     mac,
     linux,
     chrome_os,
     android,
     ios,
     unknown
   };
 
@@ skipping 37 matching lines @@
     static void get(optional boolean isLocal, DeviceInfoCallback callback);
   };
 
   interface Events {
     // Fired if the DeviceInfo object of any of the signed in devices
     // change or a new device is added or a device removed.
     // |callback|: The callback to be invoked with the array of DeviceInfo
     // objects.
     static void onDeviceInfoChange(DeviceInfo[] devices);
   };
-};
+};