Tests the behavior of whitelisting origins using exact matching.

Testing: http://localhost:8000/xmlhttprequest/resources/get.txt (sync)
PASS: PASS
Testing: http://localhost:8000/xmlhttprequest/resources/get.txt (async)
PASS: PASS
Testing: http://loCALhost:8000/xmlhttprequest/resources/get.txt (sync)
PASS: PASS
Testing: http://loCALhost:8000/xmlhttprequest/resources/get.txt (async)
PASS: PASS