ChromeDriver build bot fails on Waterfall for desktop platforms on running task 'gclient runhooks wrapper'

https://ci.chromium.org/p/chromium/g/chromium.chromedriver/console

stdout logs:
...
src (ERROR)
----------------------------------------
[0:00:00] Started.
----------------------------------------
Traceback (most recent call last):
  File "/b/depot_tools/metrics.py", line 215, in print_notice_and_exit
    yield
  File "/b/depot_tools/gclient.py", line 3030, in <module>
    sys.exit(main(sys.argv[1:]))
  File "/b/depot_tools/gclient.py", line 3016, 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 2714, in CMDrunhooks
    return client.RunOnDeps('runhooks', args)
  File "/b/depot_tools/gclient.py", line 1574, in RunOnDeps
    patch_refs=patch_refs)
  File "/b/depot_tools/gclient_utils.py", line 1075, in run
    self.item.run(*self.args, **self.kwargs)
  File "/b/depot_tools/gclient.py", line 899, in run
    self.ParseDepsFile()
  File "/b/depot_tools/gclient.py", line 677, in ParseDepsFile
    filepath, self.get_vars())
  File "/b/depot_tools/gclient_eval.py", line 475, in Parse
    result = ExecLegacy(content, filename, vars_override)
  File "/b/depot_tools/gclient_eval.py", line 384, in ExecLegacy
    return _DeepFormat(local_scope)
  File "/b/depot_tools/gclient_eval.py", line 375, in _DeepFormat
    for k, v in node.iteritems()
  File "/b/depot_tools/gclient_eval.py", line 375, in <dictcomp>
    for k, v in node.iteritems()
  File "/b/depot_tools/gclient_eval.py", line 378, in _DeepFormat
    return [_DeepFormat(elem) for elem in node]
  File "/b/depot_tools/gclient_eval.py", line 375, in _DeepFormat
    for k, v in node.iteritems()
  File "/b/depot_tools/gclient_eval.py", line 375, in <dictcomp>
    for k, v in node.iteritems()
  File "/b/depot_tools/gclient_eval.py", line 378, in _DeepFormat
    return [_DeepFormat(elem) for elem in node]
  File "/b/depot_tools/gclient_eval.py", line 371, in _DeepFormat
    return node.format(**vars_dict)
KeyError: 'checkout_android'
step returned non-zero exit code: 1

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