Make isUtc a getter, change some method names in Date.

runtime/bin/file_impl.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.
 
 class _FileInputStream extends _BaseDataInputStream implements InputStream {
   _FileInputStream(String name)
       : _data = const [],
         _position = 0,
         _filePosition = 0 {
     var file = new File(name);
@@ skipping 601 matching lines @@
     _ensureFileService();
     List request = new List(2);
     request[0] = _FileUtils.LAST_MODIFIED_REQUEST;
     request[1] = _name;
     return _fileService.call(request).transform((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response,
                                      "Cannot retrieve modification time "
                                      "for file '$_name'");
       }
-      return new Date.fromEpoch(response);
+      return new Date.fromMillisecondsSinceEpoch(response);
     });
   }
 
   Date lastModifiedSync() {
-    return new Date.fromEpoch(_FileUtils.checkedLastModified(_name));
+    int ms = _FileUtils.checkedLastModified(_name);
+    return new Date.fromMillisecondsSinceEpoch(ms);
   }
 
   RandomAccessFile openSync([FileMode mode = FileMode.READ]) {
     if (mode != FileMode.READ &&
         mode != FileMode.WRITE &&
         mode != FileMode.APPEND) {
       throw new FileIOException("Unknown file mode. Use FileMode.READ, "
                                 "FileMode.WRITE or FileMode.APPEND.");
     }
     var id = _FileUtils.checkedOpen(_name, mode._mode);
@@ skipping 516 matching lines @@
           new FileIOException("File closed '$_name'"));
     });
     return completer.future;
   }
 
   final String _name;
   int _id;
 
   SendPort _fileService;
 }