Skip OWNERS checks for CQ dry runs

presubmit_canned_checks.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Generic presubmit checks that can be reused by other presubmit checks."""
 
 import os as _os
 _HERE = _os.path.dirname(_os.path.abspath(__file__))
 
 # Justifications for each filter:
@@ skipping 836 matching lines @@
             'builds are pending.' % max_pendings,
         long_text='\n'.join(out))]
   return []
 
 
 def CheckOwners(input_api, output_api, source_file_filter=None):
   if input_api.is_committing:
     if input_api.tbr:
       return [output_api.PresubmitNotifyResult(
           '--tbr was specified, skipping OWNERS check')]
-    if not input_api.change.issue:
+    if input_api.change.issue:
+      if _GetRietveldIssueProps(input_api, None).get('cq_dry_run', False):
+        return [output_api.PresubmitNotifyResult(
+            'This is a CQ dry run, skipping OWNERS check')]
+    else:
       return [output_api.PresubmitError("OWNERS check failed: this change has "
           "no Rietveld issue number, so we can't check it for approvals.")]
     needed = 'LGTM from an OWNER'
     output = output_api.PresubmitError
   else:
     needed = 'OWNER reviewers'
     output = output_api.PresubmitNotifyResult
 
   affected_files = set([f.LocalPath() for f in
       input_api.change.AffectedFiles(file_filter=source_file_filter)])
@@ skipping 253 matching lines @@
   for f in affected_files:
     cmd = ['gn', 'format', '--dry-run', f.AbsoluteLocalPath()]
     rc = gn.main(cmd)
     if rc == 2:
       warnings.append(output_api.PresubmitPromptWarning(
           '%s requires formatting. Please run `gn format --in-place %s`.' % (
               f.AbsoluteLocalPath(), f.LocalPath())))
   # It's just a warning, so ignore other types of failures assuming they'll be
   # caught elsewhere.
   return warnings