Mark XHTML Mobile Profile and WCSS tests as WONTFIX.

Like WML, we are not planning to support these.

R=japhet
TEST=none
BUG=12254
BUG=12310

Review URL: http://codereview.chromium.org/449057

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@33445 0039d316-1c4b-4281-b951-d872f2087c98