Apply gerrit ref if it is a Gerrit patch

infra/bots/recipes/swarm_perf.py

Index: infra/bots/recipes/swarm_perf.py
diff --git a/infra/bots/recipes/swarm_perf.py b/infra/bots/recipes/swarm_perf.py
index 60ebaee88beff80b3c7fa4d59a98cb731a653bad..0701809a90c0127aa0a69e505fa30d4bdb373d24 100644
--- a/infra/bots/recipes/swarm_perf.py
+++ b/infra/bots/recipes/swarm_perf.py
@@ -173,6 +173,7 @@ def perf_steps(api):
     properties.extend([
       'issue',    api.vars.issue,
       'patchset', api.vars.patchset,
+      'patch_storage', api.vars.patch_storage,
     ])
 
   target = 'nanobench'
@@ -327,3 +328,23 @@ def GenTests(api):
     ) +
     api.platform('win', 64)
   )
+
+  gerrit_kwargs = {
+    'patch_storage': 'gerrit',
+    'repository': 'skia',
+    'event.patchSet.ref': 'refs/changes/00/2100/2',
+    'event.change.number': '2100',
+  }
+  yield (
+      api.test('recipe_with_gerrit_patch') +
+      api.properties(
+          buildername='Perf-Ubuntu-GCC-ShuttleA-GPU-GTX550Ti-x86_64-Release-' +
+                      'Valgrind-Trybot',
+          mastername='client.skia',
+          slavename='skiabot-linux-swarm-000',
+          buildnumber=5,
+          path_config='kitchen',
+          swarm_out_dir='[SWARM_OUT_DIR]',
+          revision='abc123',
+          **gerrit_kwargs)
+  )