Refactoring: Rename InputTypeUI class to InputTypeView.

BUG=274205
TEST=none; no behavior changes.

Review URL: https://chromiumcodereview.appspot.com/23313007

git-svn-id: svn://svn.chromium.org/blink/trunk@156692 bbb929c8-8fbe-4397-9dbb-9b2b20218538