CONSOLE MESSAGE: EventSource's response has a charset ("windows-1251") that is not UTF-8. Aborting the connection.
CONSOLE MESSAGE: EventSource's response has a MIME type ("text/event-stream-foobar") that is not "text/event-stream". Aborting the connection.
Test for bug 45372: https://bugs.webkit.org/show_bug.cgi?id=45372

Test EventSource with an event-stream with a Content-Type with a charset is still recognized. You should see 5 PASSED below.

PASSED: text/event-stream; charset=UTF-8
PASSED: text/event-stream; charset=windows-1251
PASSED: text/event-stream; charset=utf-8
PASSED: text/event-stream; charset="UTF-8"
PASSED: text/event-stream-foobar;