Don't do the pre-emptive unexclude by-path on Lion. It's available to root only so it never works for us and spews log messages:
Don't do the pre-emptive unexclude by-path on Lion. It's available to root
only so it never works for us and spews log messages:

"This process is attempting to exclude an item from Time Machine by path
without administrator privileges. This is not supported."

BUG=74053
TEST=No more console spew for this issue on Lion
Review URL: http://codereview.chromium.org/7166006

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@89081 0039d316-1c4b-4281-b951-d872f2087c98

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