[chromium] remove deprecated WebTestRunner::setFocus API
https://bugs.webkit.org/show_bug.cgi?id=111354

Reviewed by James Robinson.

* DumpRenderTree/chromium/TestRunner/public/WebTestDelegate.h:
(WebTestDelegate):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144733 268f45cc-cd09-0410-ab3c-d52691b4dbfc