[webkit-help] How does native UI widget for HTML Inputs get created

[n179911]

Hi,

I am looking thru Webkit code,
For each html input, it has
1. HTMLInputElement for the DOM
2.RenderButton for the Render Tree

But my question is how does these map to the native UI widget that
WebKit creates to display on screen?
Can you please point me to the code which webkit creates the native UI
widget (e.g. Text box for html input element)?

Thank you.