Add fieldtrial config for the MinorModeRestrictionsForHistorySyncOptInIos

Bug: b:324633884
Change-Id: I376e51b4ec9c9447a64b96110946af9cbc7e2ff8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5299736
Commit-Queue: James Lee <ljjlee@google.com>
Reviewed-by: James Lee <ljjlee@google.com>
Auto-Submit: Tomek Jurkiewicz <tju@google.com>
Cr-Commit-Position: refs/heads/main@{#1261205}

diff --git a/testing/variations/fieldtrial_testing_config.json b/testing/variations/fieldtrial_testing_config.json
index 0ccb309..87541493 100644
--- a/testing/variations/fieldtrial_testing_config.json
+++ b/testing/variations/fieldtrial_testing_config.json

@@ -11598,6 +11598,24 @@
             ]
         }
     ],
+    "MinorModeRestrictionsForHistorySyncOptInIosStudy": [
+        {
+            "platforms": [
+                "ios"
+            ],
+            "experiments": [
+                {
+                    "name": "LowDeadline",
+                    "params": {
+                        "MinorModeRestrictionsFetchDeadlineMs": "400"
+                    },
+                    "enable_features": [
+                        "MinorModeRestrictionsForHistorySyncOptIn"
+                    ]
+                }
+            ]
+        }
+    ],
     "MiracleParameterForAndroid": [
         {
             "platforms": [