Add NavigationPredictorPreconnectSocketCompletionTime to field trial file

Bug: 1130607
Change-Id: If75e1cd436fc5383f5c786e95a6525f35606f627
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2462625
Auto-Submit: Tarun Bansal <tbansal@chromium.org>
Commit-Queue: Robert Ogden <robertogden@chromium.org>
Reviewed-by: Robert Ogden <robertogden@chromium.org>
Cr-Commit-Position: refs/heads/master@{#815443}

testing/variations/fieldtrial_testing_config.json

@@ -4451,6 +4451,28 @@
             ]
         }
     ],
+    "NavigationPredictorPreconnectSocketCompletionTime": [
+        {
+            "platforms": [
+                "android",
+                "chromeos",
+                "linux",
+                "mac",
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "params": {
+                        "preconnect_socket_completion_time_msec": "3000"
+                    },
+                    "enable_features": [
+                        "NavigationPredictorPreconnectSocketCompletionTime"
+                    ]
+                }
+            ]
+        }
+    ],
     "NewUsbBackend": [
         {
             "platforms": [