Revert "Parts must start with 'part of'" and "Attempt to fix VM build"

dart/lib/compiler/implementation/filenames.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-library filenames;
+#library('filenames');
 
-import 'dart:io';
-import 'dart:uri';
+#import('dart:io');
+#import('dart:uri');
 
 // TODO(ahe): This library should be replaced by a general
 // path-munging library.
 //
 // See also:
 // http://blogs.msdn.com/b/ie/archive/2006/12/06/file-uris-in-windows.aspx
 
 String nativeToUriPath(String filename) {
   return new Path.fromNative(filename).toString();
 }
 
 String uriPathToNative(String path) {
   return new Path(path).toNativePath();
 }
 
 Uri getCurrentDirectory() {
   final String dir = nativeToUriPath(new File('.').fullPathSync());
   return new Uri.fromComponents(scheme: 'file', path: appendSlash(dir));
 }
 
 String appendSlash(String path) => path.endsWith('/') ? path : '$path/';