third_party/WebKit/LayoutTests/css3/filters/effect-blur-hw.html

<style>
img {
    margin: 10px;
    transform:translateZ(0);
}
</style>
<img style="filter: blur(0)" src="resources/reference.png">
<img style="filter: blur(2px)" src="resources/reference.png">
<img style="filter: blur(3px 3px)" src="resources/reference.png">
<img style="filter: blur(10px)" src="resources/reference.png">