Add support for HttpServer.defaultResponseHeaders to HttpMultiServer.

R=rnystrom@google.com
BUG=

Review URL: https://codereview.chromium.org//469583002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@39235 260f80e4-7a28-3924-810f-c04153c831b5
5 files changed
tree: 6664ca4e2593aa097125a3e55e7f23c10753ec93
  1. pkgs/