No payloads are generated for these boards due to SyncChrome failing consistently.

https://uberchromegw.corp.google.com/i/chromeos_release/builders/x86-mario-release%20release-R53-8530.B/builds/21/steps/SyncChrome/logs/stdio

https://uberchromegw.corp.google.com/i/chromeos_release/builders/x86-zgb-release%20release-R53-8530.B/builds/26/steps/SyncChrome/logs/stdio

https://uberchromegw.corp.google.com/i/chromeos_release/builders/squawks-release%20release-R53-8530.B/builds/26/steps/SyncChrome/logs/stdio

The shared traceback:

Traceback (most recent call last):
  File "/b/depot_tools/gclient.py", line 2359, in <module>
    sys.exit(main(sys.argv[1:]))
  File "/b/depot_tools/gclient.py", line 2345, in main
    return dispatcher.execute(OptionParser(), argv)
  File "/b/depot_tools/subcommand.py", line 252, in execute
    return command(parser, args[1:])
  File "/b/depot_tools/gclient.py", line 2160, in CMDrevert
    return client.RunOnDeps('revert', args)
  File "/b/depot_tools/gclient.py", line 1550, in RunOnDeps
    work_queue.flush(revision_overrides, command, args, options=self._options)
  File "/b/depot_tools/gclient_utils.py", line 907, in flush
    self._run_one_task(self.queued.pop(i), args, kwargs)
  File "/b/depot_tools/gclient_utils.py", line 999, in _run_one_task
    task_item.run(*args, **kwargs)
  File "/b/depot_tools/gclient.py", line 850, in run
    file_list)
  File "/b/depot_tools/gclient_scm.py", line 166, in RunCommand
    return getattr(self, command)(options, args, file_list)
  File "/b/depot_tools/gclient_scm.py", line 764, in revert
    return self.update(options, [], file_list)
  File "/b/depot_tools/gclient_scm.py", line 598, in update
    merge=options.merge)
AttributeError: Values instance has no attribute 'merge'
21:22:12: WARNING: Chrome checkout appears corrupt. Clobbering.
21:22:22: INFO: RunCommand: /b/depot_tools/gclient config --spec "solutions = [{'custom_deps': {},
  'custom_vars': {},
  'deps_file': 'releases/53.0.2785.27/DEPS',
  'managed': True,
  'name': 'CHROME_DEPS',
  'url': 'https://chrome-internal.googlesource.com/chrome/tools/buildspec.git'}]
" in /b/cbuild/shared_internal/.cache/distfiles/target/chrome-src-internal
21:22:22: INFO: RunCommand: /b/depot_tools/gclient sync --verbose --nohooks --transitive --with_branch_heads --with_tags --reset --force --delete_unversioned_trees in /b/cbuild/shared_internal/.cache/distfiles/target/chrome-src-internal
Looking for .gclient starting from /b/cbuild/shared_internal/.cache/distfiles/target/chrome-src-internal