Get rid of all the library tags.

lib/src/base_request.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 base_request;
-
 import 'dart:async';
 import 'dart:collection';
 
 import 'byte_stream.dart';
 import 'client.dart';
 import 'streamed_response.dart';
 import 'utils.dart';
 
 /// The base class for HTTP requests.
 ///
@@ skipping 114 matching lines @@
   }
 
   // Throws an error if this request has been finalized.
   void _checkFinalized() {
     if (!finalized) return;
     throw new StateError("Can't modify a finalized Request.");
   }
 
   String toString() => "$method $url";
 }