Rename Date to DateTime.

sdk/lib/io/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.
 
 part of dart.io;
 
 class _FileInputStream extends _BaseDataInputStream implements InputStream {
   _FileInputStream(String name)
       : _data = const [],
         _position = 0,
@@ skipping 467 matching lines @@
 
 
   external static _lengthFromName(String name);
 
   int lengthSync() {
     var result = _lengthFromName(_name);
     throwIfError(result, "Cannot retrieve length of file '$_name'");
     return result;
   }
 
-  Future<Date> lastModified() {
+  Future<DateTime> lastModified() {
     _ensureFileService();
     List request = new List.fixedLength(2);
     request[0] = _LAST_MODIFIED_REQUEST;
     request[1] = _name;
     return _fileService.call(request).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response,
                                      "Cannot retrieve modification time "
                                      "for file '$_name'");
       }
-      return new Date.fromMillisecondsSinceEpoch(response);
+      return new DateTime.fromMillisecondsSinceEpoch(response);
     });
   }
 
   external static _lastModified(String name);
 
-  Date lastModifiedSync() {
+  DateTime lastModifiedSync() {
     var ms = _lastModified(name);
     throwIfError(ms, "Cannot retrieve modification time for file '$_name'");
-    return new Date.fromMillisecondsSinceEpoch(ms);
+    return new DateTime.fromMillisecondsSinceEpoch(ms);
   }
 
   external static _open(String name, int mode);
 
   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.");
@@ skipping 637 matching lines @@
           new FileIOException("File closed '$_name'"));
     });
     return completer.future;
   }
 
   final String _name;
   int _id;
 
   SendPort _fileService;
 }