Emilie Wood

For reference - http://stackoverflow.com/questions/34209783/is-it-possible-to-style-the-iron-autogrow-textarea-scrollbar-in-polymer-1-x

This sounds like a generic problem, the above pseudoselectors were just an example ([see here](https://css-tricks.com/custom-scrollbars-in-webkit/)). The only way I got this to work was to copy the `iron-autogrow-textarea` code, rename...