[perf] Add missing change for setting up flutter instance.

Bug: skia:9789
Change-Id: Ia88755a4744cb9912fccdec7a4dfd874822a9607
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/264690
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
diff --git a/perf/setup.sh b/perf/setup.sh
index 7ed4323..b2a9f91 100755
--- a/perf/setup.sh
+++ b/perf/setup.sh
@@ -7,3 +7,4 @@
 cbt --instance production createtable perf-android families=V:maxversions=1,S:maxversions=1,D:maxversions=1,H:maxversions=1,I:maxversions=1
 cbt --instance production createtable perf-ct families=V:maxversions=1,S:maxversions=1,D:maxversions=1,H:maxversions=1,I:maxversions=1
 cbt --instance production createtable perf-android-x families=V:maxversions=1,S:maxversions=1,D:maxversions=1,H:maxversions=1,I:maxversions=1
+cbt --instance production createtable perf-flutter families=V:maxversions=1,S:maxversions=1,D:maxversions=1,H:maxversions=1,I:maxversions=1