[Extensions] Remove the "use_movable_types" entry from idl/json files

chrome/common/extensions/api/hangouts_private.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.
 
 // The <code>chrome.hangoutsPrivate</code> API is used by Google Hangouts to
 // wait on a request from Chrome to start a hangout.
 // TODO(rkc): This API is temporary. We are working on plans which include
 // replacing this with a scheme based solution which might be implemented
 // using registerProtocolHandler, but we are still finishing that design.
 // See crbug.com/306672
-[use_movable_types=true] namespace hangoutsPrivate {
+namespace hangoutsPrivate {
 
   enum HangoutType {chat, video, audio};
 
   dictionary User {
     // GAIA obfuscated id of the user.
     DOMString id;
   };
 
   dictionary HangoutRequest {
     // Email of the user sending this request. This has to match the logged in
     // user otherwise the hangout will not be opened.
     DOMString from;
 
     // A list of users with whom to start this hangout with.
     User[] to;
 
     // Type of hangout request.
     HangoutType type;
   };
 
   interface Events {
     // Fired when Chrome wants to request a new hangout be opened up with a
     // user (or set of users).
     static void onHangoutRequested(HangoutRequest request);
   };
 };