[Extensions] Convert APIs to use movable types [13]

extensions/common/api/system_display.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>system.display</code> API to query display metadata.
-namespace system.display {
+[use_movable_types=true] namespace system.display {
 
   dictionary Bounds {
     // The x-coordinate of the upper-left corner.
     long left;
 
     // The y-coordinate of the upper-left corner.
     long top;
 
     // The width of the display in pixels.
     long width;
@@ skipping 129 matching lines @@
     // enables the feature, but will not change the actual desktop mode.
     // (That is, if the desktop is in mirror mode, it will stay in mirror mode)
     static void enableUnifiedDesktop(boolean enabled);
   };
 
   interface Events {
     // Fired when anything changes to the display configuration.
     static void onDisplayChanged();
   };
 };