Add no_auth flag to skip auth checking for buckets that don't require it. Also fix tests

Add no_auth flag to skip auth checking for buckets that don't require it.  Also fix tests

BUG=321254
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=236039

[ghost stip (do not use), 2013-11-19 19:32:36]

lgtm

https://codereview.chromium.org/76583002/diff/1/download_from_google_storage.py
File download_from_google_storage.py (right):

https://codereview.chromium.org/76583002/diff/1/download_from_google_storage....
download_from_google_storage.py:301: help='Skip auth checking.  Use if its known
that the '
it's

https://codereview.chromium.org/76583002/diff/1/tests/upload_to_google_storag...
File tests/upload_to_google_storage_unittests.py (right):

https://codereview.chromium.org/76583002/diff/1/tests/upload_to_google_storag...
tests/upload_to_google_storage_unittests.py:32: self.gsutil =
GsutilMock(GSUTIL_DEFAULT_PATH, None)
add a bug to add this to presubmit

[M-A Ruel, 2013-11-19 19:34:40]

lgtm

https://codereview.chromium.org/76583002/diff/1/tests/download_from_google_st...
File tests/download_from_google_storage_unittests.py (right):

https://codereview.chromium.org/76583002/diff/1/tests/download_from_google_st...
tests/download_from_google_storage_unittests.py:182: if not
sys.platform.startswith('win'):
if sys.platform != 'win32':

since it will never be win64.

[Ryan Tseng, 2013-11-19 20:16:32]

PTAL again - Pointing the boto file to nothing should be a more better way to
implement --no_auth

[M-A Ruel, 2013-11-19 20:18:28]

lgtm

[commit-bot: I haz the power, 2013-11-19 20:23:28]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hinoka@chromium.org/76583002/80002

[commit-bot: I haz the power, 2013-11-19 20:25:23]

Change committed as 236039