Move some mac_util functions into foundation_util.

BUG=None
TEST=None
Review URL: http://codereview.chromium.org/6278018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72966 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed