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

extensions/common/api/display_source.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.displaySource</code> API creates a Display
 // session using WebMediaStreamTrack as sources.
-[use_movable_types=true] namespace displaySource {
+namespace displaySource {
   enum ErrorType {
     // The connection with sink cannot be established or has dropped
     // unexpectedly.
     connection_error,
 
     // The capabilities of this Display Source and the connected
     // sink do not fit (e.g. the sink cannot play the media content of
     // the formats given by the source).
     capabilities_negotiation_error,
 
@@ skipping 116 matching lines @@
     // Event fired when the Display session is terminated.
     // |sinkId| Id of the peer sink
     [nocompile] static void onSessionTerminated(long sinkId);
     // Event fired when an error occurs.
     // |sinkId| Id of the peer sink
     // |errorInfo| error description
     [nocompile] static void onSessionErrorOccured(long sinkId,
                                                   ErrorInfo errorInfo);
   };
 };