Add support for LUCI CQ Cq-Depend syntax

BUG=chromium:945580
TEST=./run_tests

Change-Id: I9a23b7cd0b085ad78187bd2037d1fbdaf9120680
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1564905
Tested-by: Jason Clinton <jclinton@chromium.org>
Reviewed-by: Jason Clinton <jclinton@chromium.org>
diff --git a/scripts/gerrit.py b/scripts/gerrit.py
index 558e457..d689585 100644
--- a/scripts/gerrit.py
+++ b/scripts/gerrit.py
@@ -89,9 +89,12 @@
   """
   gob = opts.gob
   if cl is not None:
-    if cl.startswith('*'):
+    if cl.startswith('*') or cl.startswith('chrome-internal:'):
       gob = config_lib.GetSiteParams().INTERNAL_GOB_INSTANCE
-      cl = cl[1:]
+      if cl.startswith('*'):
+        cl = cl[1:]
+      else:
+        cl = cl[16:]
     elif ':' in cl:
       gob, cl = cl.split(':', 1)