138d51829f
This cleans up some duplication and will make it easier to change or add common streams in the future. R=rnystrom@google.com Review URL: https://codereview.chromium.org//249183005 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@35341 260f80e4-7a28-3924-810f-c04153c831b5