Media Galleries API Metadata: Rename MediaFileSystemMetadata callback.

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.
 
 // Use the <code>chrome.mediaGalleries</code> API to access media files (images,
 // video, audio) from the user's local disks (with the user's consent).
 namespace mediaGalleries {
 
   [inline_doc] enum GetMediaFileSystemsInteractivity {
     // Do not act interactively.
@@ skipping 32 matching lines @@
     boolean isRemovable;
 
     // True if the device the media gallery is on was detected as a media
     // device.  i.e. a PTP or MTP device, or a DCIM directory is present.
     boolean isMediaDevice;
 
     // True if the device is currently available.
     boolean isAvailable;
   };
 
-  callback MediaGalleriesMetadataCallback =
+  callback MediaFileSystemsMetadataCallback =
       void (MediaFileSystemMetadata[] metadata);
 
   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);
 
     // Get metadata about a specific media file system.
     [nocompile] static MediaFileSystemMetadata getMediaFileSystemMetadata(
         [instanceOf=DOMFileSystem] object mediaFileSystem);
 
     // Get metadata for all available media galleries.
     static void getAllMediaFileSystemMetadata(
-        MediaGalleriesMetadataCallback callback);
+        MediaFileSystemsMetadataCallback callback);
   };
 
 };