Trigger experimental recipe-based trybots for 1% of Chromium CLs.

commit-queue/projects.py

Index: commit-queue/projects.py
===================================================================
--- commit-queue/projects.py	(revision 244153)
+++ commit-queue/projects.py	(working copy)
@@ -22,6 +22,7 @@
 from verification import project_base
 from verification import reviewer_lgtm
 from verification import tree_status
+from verification import trigger_experimental_try_job
 from verification import try_job_steps
 from verification import try_job_on_rietveld
 from verification import try_server
@@ -451,6 +452,19 @@
               trigger_bot_steps=regular_tests,
               use_triggered_bot=False))
 
+    # Experimental recipe-based Chromium trybots. To avoid possible capacity
+    # problems, only enable for a small percentage of try runs.
+    verifiers.append(
+        trigger_experimental_try_job.TriggerExperimentalTryJobVerifier(
+            context_obj,
+            percentage=0.01,
+            try_job_description={
+                'linux_chromium_dbg': ['defaulttests'],
+                'linux_chromium_rel': ['defaulttests'],
+                'mac_chromium_dbg': ['defaulttests'],
+                'mac_chromium_rel': ['defaulttests'],
+            }))
+
   verifiers.append(try_job_on_rietveld.TryRunnerRietveld(
       context_obj,
       'http://build.chromium.org/p/tryserver.chromium/',