Convert focused-input-should-assist-on-touch.html into an automated test

Convert focused-input-should-assist-on-touch.html into an automated test
https://bugs.webkit.org/show_bug.cgi?id=149724

Reviewed by Simon Fraser.

.:

Remove a manual test that can now be rewritten as an automated test.

* ManualTests/ios/focused-input-should-assist-on-touch.html: Removed.

LayoutTests:

Tests that an input that focuses itself on touch and then prevents default is
able to trigger node assistance, even when it is already focused before the
user gesture.

* fast/events/ios/focused-input-should-assist-on-touch-expected.txt: Added.
* fast/events/ios/focused-input-should-assist-on-touch.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@190451 268f45cc-cd09-0410-ab3c-d52691b4dbfc