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

chrome/common/extensions/api/cast_devices_private.idl

 // Copyright 2015 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.cast.devicesPrivate</code> API manages starting and stopping
 // casts based on receiver names. It also provides a list of available
 // receivers.
-[use_movable_types=true] namespace cast.devicesPrivate {
+namespace cast.devicesPrivate {
   // A cast receiver is an actual cast device. It has a unique |id| and a
   // non-unique |name| which is how people identify it.
   dictionary Receiver {
     // The unique id of a receiver.
     DOMString id;
 
     // The human-readable name of the receiver.
     DOMString name;
   };
 
@@ skipping 35 matching lines @@
     // Stops a cast. This should always be a user-initiated stop.
     static void stopCast(DOMString reason);
 
     // Starts a new cast.
     //
     // |receiverId|: The receiver ID to initiate a cast on. The implementation
     // will handle selecting an appropriate activity.
     static void startCast(DOMString receiverId);
   };
 };