Added tapted@ to c/b/ui/cocoa/apps/OWNERS

NOTRY=true
BUG=None

Review URL: https://codereview.chromium.org/61163003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235926 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235926