Fix typo that broke Yahoo! South Africa.

BUG=299640
TEST=Omnibox searches with Yahoo! South Africa should work.
TBR=estade

Review URL: https://codereview.chromium.org/25097003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225734 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225734