autotest: Run WiFi best case performance tests nightly

These tests collect and upload best case performance numbers for
a variety of WiFi router configurations.

BUG=chromium:335376
TEST=None

Change-Id: I07fa1c71814495e17e3ee4f49b85073e095937d9
Reviewed-on: https://chromium-review.googlesource.com/182926
Tested-by: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Dan Shi <dshi@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
diff --git a/suite_scheduler.ini b/suite_scheduler.ini
index 23828f8..9941421 100644
--- a/suite_scheduler.ini
+++ b/suite_scheduler.ini
@@ -254,6 +254,12 @@
 branch_specs: >=R29
 pool: wificell
 
+[WiFi_Perf]
+run_on: nightly
+suite: wifi_perf
+branch_specs: >= R29
+pool: wificell
+
 [WiMAX]
 run_on: nightly
 suite: wimax