config/doc/probe/chromium_pgo.hjson

{
  "probes": {
    "chromium_pgo": {
       // (Optional) Root path for the PGO profile directories on the target device.
       // The browser package name and pgo directory path will be appended to this path.
       // Example: org.chromium.chrome/cache/pgo_profiles
      "remote_pgo_root_path": "/data_mirror/data_ce/null/0/"
    }
  }
}