LayoutTests/css3/filters/effect-contrast-hw.html

<style>
img {
    -webkit-transform:translateZ(0);
}
</style>
<img style="filter: contrast(0)" src="resources/reference.png">
<img style="filter: contrast(0.5)" src="resources/reference.png">
<img style="filter: contrast(1.0)" src="resources/reference.png">
<img style="filter: contrast(2)" src="resources/reference.png">
<img style="filter: contrast(5)" src="resources/reference.png">
<img style="filter: contrast(10)" src="resources/reference.png">