[Password Manager] Setup experiment to restrict autofilling of sync credential

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 39f0c0555de9e79d5357925b328d79839e2ec10a..129e646f0e3c7a39ab384be66af2663e6d5c065d 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -489,6 +489,16 @@ const Experiment::Choice kEnableDropSyncCredentialChoices[] = {
     password_manager::switches::kDisableDropSyncCredential, "" },
 };
 
+const Experiment::Choice kAutofillSyncCredentialChoices[] = {
+  { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", ""},
+  { IDS_ALLOW_AUTOFILL_SYNC_CREDENTIAL,
+    password_manager::switches::kAllowAutofillSyncCredential, ""},
+  { IDS_DISALLOW_AUTOFILL_SYNC_CREDENTIAL_FOR_REAUTH,
+    password_manager::switches::kDisallowAutofillSyncCredentialForReauth, ""},
+  { IDS_DISALLOW_AUTOFILL_SYNC_CREDENTIAL,
+    password_manager::switches::kDisallowAutofillSyncCredential, ""},
+};
+
 // RECORDING USER METRICS FOR FLAGS:
 // -----------------------------------------------------------------------------
 // The first line of the experiment is the internal name. If you'd like to
@@ -1922,7 +1932,14 @@ const Experiment kExperiments[] = {
     IDS_FLAGS_ENABLE_DROP_SYNC_CREDENTIAL_DESCRIPTION,
     kOsAll,
     MULTI_VALUE_TYPE(kEnableDropSyncCredentialChoices)
-  }
+  },
+  {
+    "autofill-sync-credential",
+    IDS_FLAGS_AUTOFILL_SYNC_CREDENTIAL_NAME,
+    IDS_FLAGS_AUTOFILL_SYNC_CREDENTIAL_DESCRIPTION,
+    kOsAll,
+    MULTI_VALUE_TYPE(kAutofillSyncCredentialChoices)
+  },
 };
 
 const Experiment* experiments = kExperiments;