We had base/task_scheduler/OWNERS
and a per-file rule in base/test/OWNERS as
per-file *task_scheduler*=file://base/task_scheduler/OWNERS

In a CL (https://chromium-review.googlesource.com/c/chromium/src/+/1161088) I'm deleting base/task_scheduler/OWNERS and tweaking the per-file rule in base/test/OWNERS but I can't make the presubmit happy whether I tweak or delete the rule... Assuming it looks up the server's version of base/test/OWNERS such that I can't do this in a single CL... All the logic should be based on local source or this gets in the way of moving files.

D:\src\chrome2\src>git cl presubmit
Running presubmit commit checks ...
Traceback (most recent call last):
  File "D:\src\depot_tools\metrics.py", line 215, in print_notice_and_exit
    yield
  File "D:\src\depot_tools\\git_cl.py", line 6087, in <module>
    sys.exit(main(sys.argv[1:]))
  File "D:\src\depot_tools\\git_cl.py", line 6069, in main
    return dispatcher.execute(OptionParser(), argv)
  File "D:\src\depot_tools\subcommand.py", line 252, in execute
    return command(parser, args[1:])
  File "D:\src\depot_tools\metrics.py", line 200, in _inner
    return self._collect_metrics(func, command_name, *args, **kwargs)
  File "D:\src\depot_tools\metrics.py", line 157, in _collect_metrics
    result = func(*args, **kwargs)
  File "D:\src\depot_tools\\git_cl.py", line 4848, in CMDpresubmit
    parallel=options.parallel)
  File "D:\src\depot_tools\\git_cl.py", line 1531, in RunHook
    parallel=parallel)
  File "D:\src\depot_tools\presubmit_support.py", line 1547, in DoPresubmitChecks
    results += executer.ExecPresubmitScript(presubmit_script, filename)
  File "D:\src\depot_tools\presubmit_support.py", line 1454, in ExecPresubmitScript
    result = eval(function_name + '(*__args)', context)
  File "<string>", line 1, in <module>
  File "<string>", line 3349, in CheckChangeOnCommit
  File "<string>", line 2856, in _CommonChecks
  File "D:\src\depot_tools\presubmit_canned_checks.py", line 1032, in PanProjectChecks
    input_api, output_api, source_file_filter=None))
  File "D:\src\depot_tools\presubmit_canned_checks.py", line 887, in CheckOwners
    override_files=input_api.change.OriginalOwnersFiles())
  File "D:\src\depot_tools\owners_finder.py", line 40, in __init__
    self.db.load_data_needed_for(files)
  File "D:\src\depot_tools\owners.py", line 215, in load_data_needed_for
    self._read_owners(self.os_path.join(dirpath, 'OWNERS'))
  File "D:\src\depot_tools\owners.py", line 300, in _read_owners
    lineno, '\n'.join(comment + line_comment))
  File "D:\src\depot_tools\owners.py", line 362, in _add_entry
    ('%s does not refer to an existing file.' % directive[5:]))
SyntaxErrorInOwnersFile: D:\src\chrome2\src\base\test\OWNERS:1 syntax error: //base/task_scheduler/OWNERS does not refer to an existing file.