<!DOCTYPE html> <!-- webkit-test-runner [ LayoutFormattingContextEnabled=true LayoutFormattingContextIntegrationEnabled=false ] -->
<style>
body {
    margin: 0px;
}
div {
    height: 50px;
    width: 40px;
    border: 10px solid green;
}
</style>
<div></div>
<div style="height: 40px;"></div>
<div></div>