chromium/chrome/test/data/client_hints/accept_ch_img_localhost.html.mock-http-headers

HTTP/1.1 200 OK
Accept-CH: dpr,sec-ch-dpr,device-memory,sec-ch-device-memory,viewport-width,sec-ch-viewport-width,rtt,downlink,ect,sec-ch-ua-arch,sec-ch-ua-platform-version,sec-ch-ua-model,sec-ch-ua-full-version,sec-ch-prefers-color-scheme,sec-ch-prefers-reduced-motion,sec-ch-ua-bitness,sec-ch-viewport-height,sec-ch-ua-full-version-list,sec-ch-ua-wow64,sec-ch-ua-form-factors,sec-ch-prefers-reduced-transparency