rAc - make sure wallet is stuck to US, not just the default country

BUG=345576

Review URL: https://codereview.chromium.org/175573006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252928 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252928