OS: Windows, Mac, Linux, ChromeOS

When a user zooms a page, collect information about the zoom action and information about the style of the zoomed page. Using this data, we hope to be able to train a machine learning model to predict whether a user will zoom a given page and by how much.

Design doc: https://docs.google.com/document/d/1B57LXyQmeeJUoUJTPWznNtseweloXdcM_uyWdZEHzNM