Link to Build:
--------------
https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/win64%20trunk/builds/7975
https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/win64%20trunk/builds/7974
https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/win64%20trunk/builds/7973
https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/win64%20trunk/builds/7972


Link to Logs:
-------------
https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/win64%20trunk/builds/7975/steps/fetch%20milestone_branch/logs/stdio
https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/win64%20trunk/builds/7974/steps/fetch%20milestone_branch/logs/stdio
https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/win64%20trunk/builds/7973/steps/fetch%20milestone_branch/logs/stdio
https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/win64%20trunk/builds/7972/steps/fetch%20milestone_branch/logs/stdio

Error from the Log:
===================
WARNING: Could not read netrc file C:/Users/chrome-bot\_netrc
Traceback (most recent call last):
  File "C:\b\build_internal\scripts\slave\.recipe_deps\build\scripts/slave\recipe_modules\gitiles\resources\gerrit_client.py", line 187, in <module>
    sys.exit(main(sys.argv[1:]))
  File "C:\b\build_internal\scripts\slave\.recipe_deps\build\scripts/slave\recipe_modules\gitiles\resources\gerrit_client.py", line 143, in main
    result = fetch(query_params)
  File "C:\b\build_internal\scripts\slave\.recipe_deps\build\scripts/slave\recipe_modules\gitiles\resources\gerrit_client.py", line 131, in fetch
    result = gitiles_get(parsed_url_with_query, handler, args.attempts)
  File "C:\b\build_internal\scripts\slave\.recipe_deps\build\scripts/slave\recipe_modules\gitiles\resources\gerrit_client.py", line 46, in gitiles_get
    return handler(CreateHttpConn(host, path))
  File "C:\b\build_internal\scripts\slave\.recipe_deps\build\scripts/slave\recipe_modules\gitiles\resources\gerrit_client.py", line 118, in handler
    result = ReadHttpResponse(conn).read()
  File "C:\b\depot_tools\gerrit_util.py", line 321, in ReadHttpResponse
    raise GerritAuthenticationError(response.status, reason)
gerrit_util.GerritAuthenticationError: Authentication failed. Please make sure your .netrc file has credentials for chrome-internal.googlesource.com
step returned non-zero exit code: 1
@@@STEP_FAILURE@@@

Unable to find a possible culprit as this is continuously failing, cc'ing few people who can help triaging it.

@bustamante: Assigning to you , request you to please take a look into it and help us to find a right owner to fix this.

Thanks.!