Files: Extract VolumeInfo interface from volume_manager.js.

ui/file_manager/audio_player/js/compiled_resources2.gyp

 # Copyright 2016 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.
 {
   'targets': [
 #    {
 #      'target_name': 'audio_player',
 #      'includes': ['../../compile_js2.gypi'],
 #    },
 #    {
-#      'target_name': 'audio_player_scripts',
-#      'includes': ['../../compile_js2.gypi'],
-#    },
-#    {
 #      'target_name': 'background',
 #      'includes': ['../../compile_js2.gypi'],
 #    },
-#    {
-#      'target_name': 'error_util',
-#      'includes': ['../../compile_js2.gypi'],
-#    },
-#    {
-#      'target_name': 'metadata_worker',
-#      'includes': ['../../compile_js2.gypi'],
-#    },
+    {
+      'target_name': 'error_util',
+      'includes': ['../../compile_js2.gypi'],
+    },
+    {
+      'target_name': 'metadata_worker',
+      'includes': ['../../compile_js2.gypi'],
+    },
 #    {
 #      'target_name': 'test_util',
 #      'includes': ['../../compile_js2.gypi'],
 #    },
   ],
 }