[File Manager] Cleanup: Moving js/css/html files to dedicated directories

chrome/browser/resources/file_manager/js/metadata/mpeg_parser.js

 // 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.
 
 function MpegParser(parent) {
   MetadataParser.call(this, parent, 'mpeg', /\.(mp4|m4v|m4a|mpe?g4?)$/i);
   this.mimeType = 'video/mpeg';
 }
 
 MpegParser.prototype = {__proto__: MetadataParser.prototype};
@@ skipping 242 matching lines @@
       // The previous read did not return the next atom header, EOF reached.
       this.vlog("EOF @" + filePos);
       onSuccess();
     }
   } catch(e) {
     return onError(e.toString());
   }
 };
 
 MetadataDispatcher.registerParserClass(MpegParser);