Export CacheMode

Author: seifibrahim32

pkgs/http/lib/browser_client.dart

@@ -2,4 +2,4 @@
 // 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.
 
-export 'src/browser_client.dart' show BrowserClient;
+export 'src/browser_client.dart' show BrowserClient, CacheMode;