Collect metrics for 'git nav-downstream'

Check that everything works with git nav-downstream, which we're not afraid of breaking

Bug: 832386
Change-Id: I7c7561c749bc72cc12804c4ebce8f827ed8be02b
Reviewed-on: https://chromium-review.googlesource.com/1134518
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
diff --git a/gclient.py b/gclient.py
index 1a3054e..2d3bdd1 100755
--- a/gclient.py
+++ b/gclient.py
@@ -2845,8 +2845,7 @@
 
 
 @subcommand.epilog("""For more information on what metrics are we collecting and
-why, please read metrics.README.md or visit
-<short link to metrics.README.md in gitiles>.""")
+why, please read metrics.README.md or visit https://bit.ly/2ufRS4p""")
 def CMDmetrics(parser, args):
   """Reports, and optionally modifies, the status of metric collection."""
   parser.add_option('--opt-in', action='store_true', dest='enable_metrics',