e36237835a
This also allows remote branch names to be used in the `ref` field for Git dependencies. BUG=4892 Review URL: https://chromiumcodereview.appspot.com//10913077 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@11856 260f80e4-7a28-3924-810f-c04153c831b5