Reviewed by Adele.

    Reviewed by Adele.

        The load events could fire before the event listener was registered making these tests fail occasionally.

        No changes to test results.

        * media/video-source-media.html:
        * media/video-source-type.html:
        * media/video-source.html:
        * media/video-src-remove.html:
        * media/video-src-source.html:
        * media/video-src.html:
        * media/video-test.js:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@28596 268f45cc-cd09-0410-ab3c-d52691b4dbfc