Settings reset prompt: Enable the feature for fieldtrial testing.

testing/variations/fieldtrial_testing_config.json

 {
     "AlternateComponentUrls": [
         {
             "platforms": [
                 "android",
                 "chromeos",
                 "ios",
                 "linux",
                 "mac",
                 "win"
@@ skipping 2496 matching lines @@
             "platforms": [
                 "win"
             ],
             "experiments": [
                 {
                     "name": "enforce_always_with_extensions_and_dse"
                 }
             ]
         }
     ],
+    "SettingsResetPrompt": [
+        {
+            "platforms": [
+                "win"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "params": {
+                        "delay_before_prompt_seconds": "1",
+                        "domain_hashes": "{\"c027a731da03fee479b2ba00b3afe74b3fd9190f0622755db8ffa504efbde66e\":\"3\"}",
+                        "prompt_wave": "20170101",
+                        "time_between_prompts_seconds": "3600"
+                    },
+                    "enable_features": [
+                        "SettingsResetPrompt"
+                    ]
+                }
+            ]
+        }
+    ],
     "SignInPasswordPromo": [
         {
             "platforms": [
                 "linux",
                 "mac",
                 "win"
             ],
             "experiments": [
                 {
                     "name": "Enable3",
@@ skipping 492 matching lines @@
                 {
                     "name": "Enabled",
                     "enable_features": [
                         "use-new-media-cache"
                     ]
                 }
             ]
         }
     ]
 }