<head>
<style>
.ignore {
-webkit-text-size-adjust: none;
}
</style>
</head>
<div class="ignore">This text should have default font size</div>
<div>This text should have larger than default font size</div>
<script>
if (window.eventSender) {
    eventSender.textZoomIn();
    eventSender.textZoomIn();
}
</script>