EmailInputType should set typeMismatch=true for emails with domain labels beginning or ending with a hyphen

Emails should be invalidated if they contain these domain labels (in accordance with RFC1035 and the HTML5
draft http://www.w3.org/TR/html5/forms.html#valid-e-mail-address, as well as Firefox)

BUG=338141

Review URL: https://codereview.chromium.org/132483006

git-svn-id: svn://svn.chromium.org/blink/trunk@165978 bbb929c8-8fbe-4397-9dbb-9b2b20218538