Known-good Version: git hash 535f86f
Known-bad Version: git hash 094ae0a


Running `./util_scripts/run.sh test` results in a bunch of failures that look like the following:

Traceback (most recent call last):
  File "/usr/local/google/home/wrengr/chromium-srcs/infra/ENV/local/lib/python2.7/site-packages/expect_tests/pipeline.py", line 397, in process_test
    subresult = subtest.run()
  File "/usr/local/google/home/wrengr/chromium-srcs/infra/ENV/local/lib/python2.7/site-packages/expect_tests/type_definitions.py", line 240, in run
    return self.func_call(context=context)
  File "/usr/local/google/home/wrengr/chromium-srcs/infra/ENV/local/lib/python2.7/site-packages/expect_tests/type_definitions.py", line 155, in __call__
    return f.func(*f.args, **f.kwargs)
  File "/usr/local/google/home/wrengr/chromium-srcs/infra/ENV/local/lib/python2.7/site-packages/expect_tests/unittest_helper.py", line 40, in _RunTestCaseSingle
    return Result(test_method())
  File "/usr/local/google/home/wrengr/chromium-srcs/infra/appengine/findit/common/test/time_util_test.py", line 44, in testGetDateTimeInTimezone
    'US/Pacific', utc_datetime)
  File "/usr/local/google/home/wrengr/chromium-srcs/infra/appengine/findit/common/time_util.py", line 60, in GetDatetimeInTimezone
    return date_time.astimezone(pytz.timezone(timezone_name))
  File "/usr/local/google/home/wrengr/chromium-srcs/infra/appengine/findit/third_party/pytz/__init__.py", line 173, in timezone
    raise UnknownTimeZoneError(zone)
UnknownTimeZoneError: 'US/Pacific'