IA2 role is not correct for input type attribute in button state and checkbox state with menu as parent.

According to specs, for input type attribute in button state with menu as parent, IA2_state should be ROLE_SYSTEM_MENUITEM and for input type attribute in checkbox state, IA2_STATE should be IA2_ROLE_CHECK_MENU_ITEM.

BUG=169574

Review URL: https://codereview.chromium.org/589383004

git-svn-id: svn://svn.chromium.org/blink/trunk@182827 bbb929c8-8fbe-4397-9dbb-9b2b20218538