* Add Web Discovery build flag * Remove obsolete kDontAskEnableWebDiscovery pref This legacy pref was only being registered and immediately cleared during migration. Remove it entirely. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>