LayoutTests/editing/text-placeholder/resources/test.css

@font-face {
    font-family: Ahem;
    src: url("../../../resources/Ahem.ttf");
}

.test {
    font: 25px/1 Ahem;
    -webkit-text-size-adjust: 100%%;
    /* To make debugging easier, make the caret stand out. */
    caret-color: blue;
    color: yellow;
}