Fix revision for WebRTC patches sent to Chromium trybots

recipe_modules/gclient/example.py

Index: recipe_modules/gclient/example.py
diff --git a/recipe_modules/gclient/example.py b/recipe_modules/gclient/example.py
index fa6daf8950862ab8c919bf525932360496efa0a9..a6903ec01795ee05c6c84dbb44edc4558932800a 100644
--- a/recipe_modules/gclient/example.py
+++ b/recipe_modules/gclient/example.py
@@ -91,6 +91,11 @@ def RunSteps(api):
 
   assert not api.gclient.is_blink_mode
 
+  if api.properties.get('patch_project'):
+    api.gclient.set_patch_project_revision(
+        patch_project=api.properties.get('patch_project'),
+        gclient_config=api.gclient.make_config('chromium_bare'))
+
 
 def GenTests(api):
   yield api.test('basic')
@@ -98,3 +103,8 @@ def GenTests(api):
   yield api.test('revision') + api.properties(revision='abc')
 
   yield api.test('tryserver') + api.properties.tryserver()
+
+  yield (
+      api.test('tryserver_webrtc_patch') +
+      api.properties.tryserver(patch_project='webrtc')
+  )