1 Test for https://bugs.webkit.org/show_bug.cgi?id=65270.
2 Resource load delegate should be able to block poster loading.
5 Testing before setting poster
6 EXPECTED (video.clientWidth == '300') OK
7 EXPECTED (video.clientHeight == '150') OK
9 Test after setting poster
10 EXPECTED (video.clientWidth == '300') OK
11 EXPECTED (video.clientHeight == '150') OK