[SyncUSSAutofillWalletData] Disable the feature by default

This CL disables the feature again on ToT. The reason is that the launch
to M71 Stable failed due to unexpected highly increased traffic. The
plan is to investigate and fix the underlying bug and restart the
launch.

Bug: 924447
Change-Id: Id76cc3865fefe22785f40bac66295c3ccc4b3da3
Reviewed-on: https://chromium-review.googlesource.com/c/1430080
Auto-Submit: Jan Krcal <jkrcal@chromium.org>
Reviewed-by: Marc Treib <treib@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Commit-Queue: Jan Krcal <jkrcal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625715}

components/sync/driver/sync_driver_switches.cc

@@ -125,7 +125,7 @@ const base::Feature kSyncUSSAutofillProfile{"SyncUSSAutofillProfile",
 
 // Enable USS implementation of autofill wallet datatype.
 const base::Feature kSyncUSSAutofillWalletData{
-    "SyncUSSAutofillWalletData", base::FEATURE_ENABLED_BY_DEFAULT};
+    "SyncUSSAutofillWalletData", base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Enable USS implementation of autofill wallet metadata datatype.
 const base::Feature kSyncUSSAutofillWalletMetadata{

testing/variations/fieldtrial_testing_config.json

@@ -4545,6 +4545,26 @@
             ]
         }
     ],
+    "SyncUSSAutofillWalletData": [
+        {
+            "platforms": [
+                "android",
+                "chromeos",
+                "ios",
+                "linux",
+                "mac",
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "SyncUSSAutofillWalletData"
+                    ]
+                }
+            ]
+        }
+    ],
     "TabRanker": [
         {
             "platforms": [