Test regressions are not detected when image result is missing
https://bugs.webkit.org/show_bug.cgi?id=138070

Reviewed by Simon Fraser.

* Scripts/webkitpy/layout_tests/models/test_run_results.py:
* Scripts/webkitpy/layout_tests/views/buildbot_results.py:
Count these as regressions, not as flaky tests.

* Scripts/webkitpy/port/test.py:
* Scripts/webkitpy/layout_tests/run_webkit_tests_integrationtest.py:
Test it.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@175204 268f45cc-cd09-0410-ab3c-d52691b4dbfc