Fix PWA custom metric

[tunetheweb]

Discovered the pwa custom metric isn't working when initiator is blank

---

Test websites:

• https://example.com/
• https://web.dev/

[github-actions]

https://almanac.httparchive.org/en/2022/

WPT result details

Changed custom metrics values:

{
  "_pwa": {
    "serviceWorkers": [],
    "manifests": [],
    "serviceWorkerInitiated": [],
    "workboxInfo": [],
    "importScriptsInfo": [],
    "swEventListenersInfo": [],
    "swPropertiesInfo": [],
    "swMethodsInfo": [],
    "swObjectsInfo": [],
    "swRegistrationPropertiesInfo": [],
    "windowEventListenersInfo": [],
    "windowPropertiesInfo": [],
    "serviceWorkerRegistrationInfo": [],
    "serviceWorkerHeuristic": false
  }
}

https://example.com

WPT result details

Changed custom metrics values:

{
  "_pwa": {
    "serviceWorkers": [],
    "manifests": [],
    "serviceWorkerInitiated": [],
    "workboxInfo": [],
    "importScriptsInfo": [],
    "swEventListenersInfo": [],
    "swPropertiesInfo": [],
    "swMethodsInfo": [],
    "swObjectsInfo": [],
    "swRegistrationPropertiesInfo": [],
    "windowEventListenersInfo": [],
    "windowPropertiesInfo": [],
    "serviceWorkerRegistrationInfo": [],
    "serviceWorkerHeuristic": false
  }
}

https://web.dev

WPT result details

Changed custom metrics values:

{
  "_pwa": {
    "serviceWorkers": [],
    "manifests": {
      "https://web.dev/_pwa/web/manifest.json": {
        "name": "web.dev",
        "short_name": "web.dev",
        "start_url": "/",
        "display": "standalone",
        "orientation": "portrait",
        "background_color": "#fff",
        "theme_color": "#3740ff",
        "icons": [
          {
            "src": "icons/icon-72x72.png",
            "sizes": "72x72",
            "type": "image/png"
          },
          {
            "src": "icons/icon-96x96.png",
            "sizes": "96x96",
            "type": "image/png"
          },
          {
            "src": "icons/icon-128x128.png",
            "sizes": "128x128",
            "type": "image/png"
          },
          {
            "src": "icons/icon-144x144.png",
            "sizes": "144x144",
            "type": "image/png"
          },
          {
            "src": "icons/icon-152x152.png",
            "sizes": "152x152",
            "type": "image/png"
          },
          {
            "src": "icons/icon-192x192.png",
            "sizes": "192x192",
            "type": "image/png"
          },
          {
            "src": "icons/icon-384x384.png",
            "sizes": "384x384",
            "type": "image/png"
          },
          {
            "src": "icons/icon-512x512.png",
            "sizes": "512x512",
            "type": "image/png"
          }
        ],
        "splash_pages": null
      }
    },
    "serviceWorkerInitiated": [],
    "workboxInfo": [],
    "importScriptsInfo": {
      "https://www.google.com/recaptcha/api2/webworker.js?hl=en&v=ItfkQiGBlJDHuTkOhlT3zHpB": [
        "'https://www.gstatic.com/recaptcha/releases/ItfkQiGBlJDHuTkOhlT3zHpB/recaptcha__en.js'"
      ]
    },
    "swEventListenersInfo": {
      "https://web.dev/sw.js": [
        "install",
        "activate",
        "fetch"
      ],
      "https://web-dot-devsite-v2-prod-3p.appspot.com/sw.js": [
        "install",
        "activate",
        "fetch"
      ]
    },
    "swPropertiesInfo": [],
    "swMethodsInfo": {
      "https://web.dev/sw.js": [
        "skipWaiting()"
      ]
    },
    "swObjectsInfo": {
      "https://www.gstatic.com/devrel-devsite/prod/vecc914159aeb62e475fedd3fd9a8d7496387748032a2781a73bd399d6afce3ab/js/devsite_app_module.js": [
        "caches.open",
        "caches.open",
        "caches.open"
      ],
      "https://web.dev/sw.js": [
        "caches.open",
        "clients.matchAll",
        "caches.open",
        "clients.claim",
        "clients.matchAll",
        "clients.matchAll",
        "caches.keys",
        "caches.delete"
      ],
      "https://web-dot-devsite-v2-prod-3p.appspot.com/sw.js": [
        "caches.open",
        "clients.matchAll",
        "caches.open",
        "clients.claim",
        "clients.matchAll",
        "clients.matchAll",
        "caches.keys",
        "caches.delete"
      ]
    },
    "swRegistrationPropertiesInfo": [],
    "windowEventListenersInfo": [],
    "windowPropertiesInfo": [],
    "serviceWorkerRegistrationInfo": [],
    "serviceWorkerHeuristic": true
  }
}