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chromium/third_party/blink/web_tests/css3/blending/background-blend-mode-background-origin-content-box-expected.html 

<!-- Blend a background image and a background color specifying background-origin: content-box  -->
<!DOCTYPE HTML>
<html>
<head>
<style>
div { 
	background: #777777;
	background-origin: content-box;
	width: 200px;
	height: 200px;
	margin: 10px;
}
</style>
</head>

<body>
    <div></div>
</body>
</html>