Make git cl try work in light of the new CQ config.json format

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index d8f4fd154d87a5a6f2abae5f045456853957f6d3..3c76e2b5a65edc967f6dbf9376208349724cd535 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -1749,9 +1749,11 @@ def GetPreferredTryMasters(project, change):
   with open(os.path.join(
       change.RepositoryRoot(), 'testing', 'commit_queue', 'config.json')) as f:
     cq_config = json.load(f)
-    cq_trybots = cq_config.get('trybots', {})
-    builders = cq_trybots.get('launched', {})
-    for master, master_config in cq_trybots.get('triggered', {}).iteritems():
+    cq_verifiers = cq_config.get('verifiers_no_patch', {})
+    cq_try_jobs = cq_verifiers.get('try_job_verifier', {})
+    builders = cq_try_jobs.get('launched', {})
+
+    for master, master_config in cq_try_jobs.get('triggered', {}).iteritems():
       for triggered_bot in master_config:
         builders.get(master, {}).pop(triggered_bot, None)