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chromium/third_party/blink/web_tests/fast/block/basic/013.html 

<!DOCTYPE html>
<html>
<body marginwidth=0 marginheight=0>

<iframe width=500 height=100 src="resources/013-helper.html"></iframe>
<object width=500 height=100 type="text/html" data="resources/013-helper.html"></object>