Don't use the AI_ADDRCONFIG flag on Mac OS X.  It's not necessary. Hopefully this will fix issue 12711.
Don't use the AI_ADDRCONFIG flag on Mac OS X.  It's not necessary.
Hopefully this will fix issue 12711.

R=eroman,mark
BUG=http://crbug.com/12711
TEST=covered by existing unit tests and normal browsing on Mac
Review URL: http://codereview.chromium.org/172061

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@23590 0039d316-1c4b-4281-b951-d872f2087c98

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