chromium/infra/config/generated/builders/ci/ToTMacPGO/gn-args.json

{
  "gn_args": {
    "chrome_pgo_phase": 1,
    "is_clang": true,
    "is_official_build": true,
    "llvm_force_head_revision": true,
    "symbol_level": 0,
    "target_cpu": "x64",
    "target_os": "mac",
    "use_siso": true,
    "v8_is_on_release_branch": true
  }
}