Introduce chrome://flags/#network-prediction-options-for-service-worker

testing/variations/fieldtrial_testing_config.json

Index: testing/variations/fieldtrial_testing_config.json
diff --git a/testing/variations/fieldtrial_testing_config.json b/testing/variations/fieldtrial_testing_config.json
index a97de4549bc50d856d00d7e93c0c0b70cbff2fa6..927a9b82ccd8e8f663a31f3a1b24bebc80a6c931 100644
--- a/testing/variations/fieldtrial_testing_config.json
+++ b/testing/variations/fieldtrial_testing_config.json
@@ -1704,6 +1704,31 @@
             ]
         }
     ],
+    "NetworkPredictionOptionsForServiceWorker": [
+        {
+            "platforms": [
+                "chromeos",
+                "linux",
+                "mac",
+                "win",
+                "android"
+            ],
+            "experiments": [
+                {
+                    "name": "PreconnectOnly"
+                },
+                {
+                    "name": "StartServiceWorkerAndPreconnect"
+                },
+                {
+                    "name": "StartServiceWorkerAndDeferPreconnect"
+                },
+                {
+                    "name": "StartServiceWorkerOnly"
+                }
+            ]
+        }
+    ],
     "NetworkQualityEstimator": [
         {
             "platforms": [