run-webkit-tests should support --profile and --profiler= just like run-perf-tests does
https://bugs.webkit.org/show_bug.cgi?id=111384

Reviewed by Ryosuke Niwa.

Sometimes I want to know why various LayoutTests are slow
without having to convert them into PerformanceTests in order
to use our fancy profiling.  The Driver already knows how to
do the right thing, we just need to expose the options to the user.

Handling of these options is already unittested in the perftests_unittest.

* Scripts/webkitpy/layout_tests/run_webkit_tests.py:
(parse_args):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144719 268f45cc-cd09-0410-ab3c-d52691b4dbfc