Update error regexps so that Parser/html-parser-srcdoc.html can "pass"
https://bugs.webkit.org/show_bug.cgi?id=107367

Reviewed by Ryosuke Niwa.

Using srcdoc instead of document.write changes the error output
ever so slightly.  Clearly we were already trying to ignore these
messages, just not succeeding.  This change makes this new test "pass" correctly.

* Scripts/webkitpy/performance_tests/perftest.py:
(PerfTest):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140241 268f45cc-cd09-0410-ab3c-d52691b4dbfc