fieldtrial testing OfflineContentOnDino -> AutoFetchOnNetErrorPage

- OfflineContentOnDino is launched
- AutoFetchOnNetErrorPage will be a new field trial

See crbug.com/887670 for launch bug

Change-Id: Ibdae9ba0e10bc950781cbe4aac86d6597b990eff
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1667544Reviewed-by: Carlos Knippschild <carlosk@chromium.org>
Reviewed-by: Jesse Doherty <jwd@chromium.org>
Commit-Queue: Dan H <harringtond@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672254}

testing/variations/fieldtrial_testing_config.json

@@ -595,6 +595,21 @@
             ]
         }
     ],
+    "AutoFetchOnNetErrorPage": [
+        {
+            "platforms": [
+                "android"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "AutoFetchOnNetErrorPage"
+                    ]
+                }
+            ]
+        }
+    ],
     "AutofillDoNotMigrateUnsupportedLocalCards": [
         {
             "platforms": [
@@ -3358,24 +3373,6 @@
             ]
         }
     ],
-    "OfflineContentOnDinoPage": [
-        {
-            "platforms": [
-                "android"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled_AutoFetch",
-                    "enable_features": [
-                        "AutoFetchOnNetErrorPage"
-                    ],
-                    "disable_features": [
-                        "NewNetErrorPageUI"
-                    ]
-                }
-            ]
-        }
-    ],
     "OfflineIndicator": [
         {
             "platforms": [