CPP: Remove static non-POD variables from RegionCode class. Patch contributed by georgey@chromium.org. Review URL: http://codereview.appspot.com/5449064 git-svn-id: http://libphonenumber.googlecode.com/svn/trunk/cpp/src/phonenumbers@406 ee073f10-1060-11df-b6a4-87a95322a99c