Since I see "gclient.py: error: no such option: --reset-fetch-config", this seems related to https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1135645

later followed up by:
https://chromium-review.googlesource.com/1137362

It seems like bots that picked up the first patch above, without the second, could now be broken.

 Issue 863804  has been merged into this issue.

trooper checking in: #2, that appears to be why https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/linux_chromium_component_updater/114 specifically failed. subsequent builds are failing differently:

________ running 'vpython src/tools/perf/fetch_benchmark_deps.py -f' in '/b/swarming/w/ir/cache/builder'
Traceback (most recent call last):
   at /b/swarming/w/ir/cache/builder/src/tools/perf/fetch_benchmark_deps.py:140
    main(sys.argv[1:])
  main at /b/swarming/w/ir/cache/builder/src/tools/perf/fetch_benchmark_deps.py:132
    deps[b.Name()] = _FetchDepsForBenchmark(b)
  _FetchDepsForBenchmark at /b/swarming/w/ir/cache/builder/src/tools/perf/fetch_benchmark_deps.py:77
    _FetchDependenciesIfNeeded(story_set)
  _FetchDependenciesIfNeeded at /b/swarming/w/ir/cache/builder/src/tools/perf/fetch_benchmark_deps.py:39
    story_set.wpr_archive_info.DownloadArchivesIfNeeded()
  DownloadArchivesIfNeeded at /b/swarming/w/ir/cache/builder/src/third_party/catapult/telemetry/telemetry/wpr/archive_info.py:107
    download_if_needed(archive_path)
  download_if_needed at /b/swarming/w/ir/cache/builder/src/third_party/catapult/telemetry/telemetry/wpr/archive_info.py:86
    cloud_storage.GetIfChanged(path, self._bucket)
  GetIfChanged at /b/swarming/w/ir/cache/builder/src/third_party/catapult/common/py_utils/py_utils/cloud_storage.py:451
    _GetLocked(bucket, expected_hash, file_path)
  _GetLocked at /b/swarming/w/ir/cache/builder/src/third_party/catapult/common/py_utils/py_utils/cloud_storage.py:349
    _RunCommand(['cp', url, partial_download_path.name])
  _RunCommand at /b/swarming/w/ir/cache/builder/src/third_party/catapult/common/py_utils/py_utils/cloud_storage.py:154
    raise GetErrorObjectForCloudStorageStderr(stderr)
CloudStorageError: Copying gs://chrome-partner-telemetry/e87c8d71dbe71f2068f845c26623fe996e04d613...
/ [0 files][    0.0 B/ 33.4 KiB]                                                
AccessDeniedException: 403
Locals:
  args       : ['/b/swarming/w/ir/cache/builder/src/third_party/catapult/third_party/gsutil/gsutil', 'cp', 'gs://chrome-partner-telemetry/e87c8d71dbe71f2068f845c26623fe996e04d613', u'/b/swarming/w/ir/cache/builder/src/tools/perf/page_sets/data/tmpM0icbg']
  gsutil     : 
  gsutil_env : None
  stderr     : 'Copying gs://chrome-partner-telemetry/e87c8d71dbe71f2068f845c26623fe996e04d613...\n/ [0 files][    0.0 B/ 33.4 KiB]                                                \rAccessDeniedException: 403 \n'
  stdout     : ''
Error: Command 'vpython src/tools/perf/fetch_benchmark_deps.py -f' returned non-zero exit status 1 in /b/swarming/w/ir/cache/builder

Added component-mapping-updater@chops-service-accounts.iam.gserviceaccount.com as a Viewer of the chrome-partner-telemetry gcloud project, which has read access to the gs://chrome-partner-telemetry bucket. Not clear what happened to make this particular failure start.

Kicked https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/linux_chromium_component_updater/125 after making the change mentioned in #7, which succeeded.