8533e75f97
1. Return this role as appropriate in HTMLTextFieldAccessible and update ARIAMap. 2. Remove Accessible::IsSearchbox, which is no longer required. 3. Remove Mac mozTextAccessible moxSubrole override. This was only used for password inputs and searchboxes, but we can now specify these subroles in the RoleMap instead. 4. Tweak the iOS code for the removal of IsSearchbox. Differential Revision: https://phabricator.services.mozilla.com/D233230