chromium/chrome/browser/resources/chromeos/emoji_picker/emoji_gif_nudge_overlay.html

<style>
    :host {
        --bubble-padding-top: 8px;
        --bubble-padding-bottom: 8px;
        --bubble-padding-left: 16px;
        --bubble-padding-right: 16px;
        --bubble-position-top: 72px;
        --bubble-position-right: 10px;
        --bubble-radius: 16px;
        --bubble-line-height: 20px;
        --dot-position-right: 21px;
        --dot-position-top: -15px;
        --dot-size: 8px;
        --icon-size: 20px;
        --icon-margin-right: 12px;
    }

    .overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: var(--emoji-picker-width);
        height: var(--emoji-picker-height);
    }

    .bubble {
        top: var(--bubble-position-top);
        right: var(--bubble-position-right);
        position: absolute;
        line-height: var(--bubble-line-height);
        border-radius: var(--bubble-radius);
        padding-left: var(--bubble-padding-left);
        padding-right: var(--bubble-padding-right);
        padding-top: var(--bubble-padding-top);
        padding-bottom: var(--bubble-padding-bottom);
        background-color: var(--emoji-picker-nudge-background-color);
        color: var(--emoji-picker-nudge-icon-color);
        font: var(--cros-body-1-font);
        box-sizing: border-box;
        display: flex;
    }

    .bubble>.dot {
        position: absolute;
        display: inline-block;
        width: var(--dot-size);
        height: var(--dot-size);
        border-radius: calc(var(--dot-size) * 2);
        background-color: var(--emoji-picker-nudge-background-color);
        right: var(--dot-position-right);
        top: var(--dot-position-top);
    }

    .bubble>.icon {
        -webkit-mask-image: url(/nudge_icon.svg);
        -webkit-mask-position: center;
        -webkit-mask-repeat: no-repeat;
        background-color: currentColor;
        height: var(--icons-size);
        width: var(--icon-size);
        padding-top: var(--bubble-padding-top);
        margin-right: var(--icon-margin-right);
    }

    .bubble a {
        color: var(--emoji-picker-nudge-icon-color);
    }
</style>

<div aria-hidden="true" class="overlay" on-click="onClickOverlay">
    <div class="bubble" on-click="onClickTooltip">
        <div class="dot"></div>
        <span class="icon"></span>
        <span>
            GIFs are available. <a on-click="onClickLink" href="#">Learn more</a>
        </span>
    </div>
</div>