1. Mac OS X, 32-bit port.
2. Update to NSS_3_12_6_RTM.

R=mark
BUG=30689
TEST=No build errors on Mac and Windows.
Review URL: http://codereview.chromium.org/2330001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@48497 0039d316-1c4b-4281-b951-d872f2087c98