Remove some platform specific stuff from views.

ui/file_manager/audio_player/js/metadata_worker.js

Index: ui/file_manager/audio_player/js/metadata_worker.js
diff --git a/ui/file_manager/audio_player/js/metadata_worker.js b/ui/file_manager/audio_player/js/metadata_worker.js
deleted file mode 100644
index 56ea36c7e726fe173011d7b8cba765aca55f3d95..0000000000000000000000000000000000000000
--- a/ui/file_manager/audio_player/js/metadata_worker.js
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright 2014 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 strict';
-
-// Load the worker script of Files.app.
-importScripts(
-    'chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/' +
-    'foreground/js/metadata/metadata_dispatcher.js');