autotest/tko: add tast.graphics.WebRTCVideoPlaybackDelay

This CL adds tast.graphics.WebRTCVideoPlaybackDelay to the
Chrome OS Graphics perf collection.

Cq-Depend: chromium:1678877
Bug: chromium:953253
Change-Id: Idcd34aa3e478aa71e2a7f980e04661662e4f42aa
Reviewed-on: https://chromium-review.googlesource.com/1687115
Tested-by: Miguel Casas <mcasas@chromium.org>
Tested-by: Po-Hsien Wang <pwang@chromium.org>
Commit-Ready: Miguel Casas <mcasas@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Alex Zamorzaev <zamorzaev@chromium.org>
Reviewed-by: Po-Hsien Wang <pwang@chromium.org>
diff --git a/tko/perf_upload/perf_dashboard_config.json b/tko/perf_upload/perf_dashboard_config.json
index cbc6693..deda55b 100644
--- a/tko/perf_upload/perf_dashboard_config.json
+++ b/tko/perf_upload/perf_dashboard_config.json
@@ -624,6 +624,10 @@
     "master_name": "ChromeOS_Graphics"
   },
   {
+    "autotest_name": "tast.graphics.WebRTCVideoPlaybackDelay",
+    "master_name": "ChromeOS_Graphics"
+  },
+  {
     "autotest_name": "tast.platform.MemoryPressure",
     "master_name": "ChromeOSTast"
   },