Git tests on Windows are fast now.

Review URL: https://codereview.chromium.org//11414170

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@15348 260f80e4-7a28-3924-810f-c04153c831b5

test/pub.status

@@ -9,9 +9,3 @@
 # Pub only runs on the standalone VM, not the browser.
 [ $runtime == drt || $runtime == dartium || $runtime == opera]
 *: Skip
-
-# Git on Windows is embarrassingly slow.
-# TODO(rnystrom): Get them fast enough to reliably not time out (#5271).
-[ $system == windows ]
-install/git/*: Slow, Pass, Timeout
-update/git/*: Slow, Pass, Timeout