[rAc] [OSX] Set linespacing factor for New Credit Card bubble.

BUG=325522
TEST=(see bug for screenshots)
R=groby@chromium.org

Review URL: https://codereview.chromium.org/115003002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240820 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240820