navigator_id.cc (freeze userAgent)

navigator_id.cc

String NavigatorID::platform() const {
  // If the User-Agent string is frozen, platform should be a value
  // matching the frozen string per https://github.com/WICG/ua-client-hints. See
  // content::frozen_user_agent_strings.
  if (base::FeatureList::IsEnabled(features::kFreezeUserAgent)) {
#if defined(OS_ANDROID)
    // Matches the frozen mobile User-Agent string (arbitrary Android device).
    return "Linux armv8l";
#else
    // Matches the frozen desktop User-Agent string (Windows).
    return "Win32";
#endif
  }
  // ...
}