Consider merging https://chromium.googlesource.com/chromium/blink/+/50b416aa20d9c9951496b569d4411d00c93ad5db Add support for sub-css-pixel font sizes for web fonts when the SubpixelFontScaling feature is enabled. Covered by http://blink.gs/tests/text-scaling/webfont.html, will add as a LayoutTest once supported on all platforms.