This is a follow-on to the improved CSS mask support in chromium 120 (https://chromestatus.com/feature/5839739127332864) and adds new mask support to SVG (multiple masks, as well as mask-mode, mask-composite, mask-position, and mask-repeat). In addition, remote SVG masks (e.g., mask: url(masks.svg#star)) are now supported. Explainer: https://docs.google.com/document/d/1IzQv56NzfV1hA6YPr2j1chtb5qijNxykkYY7JyccZgc/edit?usp=sharing