Move MediaGalleries.getMediaFileSystems back to experimental for M22

chrome/common/extensions/api/media_galleries.idl

-// Copyright (c) 2012 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.
-
-// File-level comment to appease parser. Eventually this will not be necessary.
-
-namespace mediaGalleries {
-
-  [inline_doc] enum GetMediaFileSystemsInteractivity {
-    // Do not act interactively.
-    no,
-    // Ask the user to manage permitted media galleries.
-    yes,
-    // Ask the user to manage permitted galleries only if the return set would
-    // otherwise be empty.
-    if_needed
-  };
-
-  [inline_doc] dictionary MediaFileSystemsDetails {
-    // Whether to prompt the user for permission to additional media galleries
-    // before returning the permitted set. Default is silent.  If the value
-    // 'yes' is passed, or if the application has not been granted access to
-    // any media galleries and the value 'if_needed' is passed, then the
-    // media gallery configuration dialog will be displayed.
-    GetMediaFileSystemsInteractivity? interactive;
-  };
-
-  callback MediaFileSystemsCallback =
-      void ([instanceOf=LocalFileSystem] optional object[] mediaFileSystems);
-
-  interface Functions {
-    // Get the media galleries configured in this user agent. If none are
-    // configured or available, the callback will receive an empty array.
-    static void getMediaFileSystems(optional MediaFileSystemsDetails details,
-                                    MediaFileSystemsCallback callback);
-  };
-
-};