Revert of Send a TrackedPreference incident when registry pref validation fails.

components/user_prefs/tracked/tracked_split_preference.cc

Index: components/user_prefs/tracked/tracked_split_preference.cc
diff --git a/components/user_prefs/tracked/tracked_split_preference.cc b/components/user_prefs/tracked/tracked_split_preference.cc
index fc67cfe8668d0f409e5a07edeb3ea3258a83b416..979f90b2388202740da64264b73c400bf01560ff 100644
--- a/components/user_prefs/tracked/tracked_split_preference.cc
+++ b/components/user_prefs/tracked/tracked_split_preference.cc
@@ -64,7 +64,7 @@
   helper_.ReportValidationResult(value_state, transaction->GetStoreUMASuffix());
 
   PrefHashStoreTransaction::ValueState external_validation_value_state =
-      PrefHashStoreTransaction::UNSUPPORTED;
+      PrefHashStoreTransaction::UNCHANGED;
   if (external_validation_transaction) {
     std::vector<std::string> invalid_external_validation_keys;
     external_validation_value_state =
@@ -73,12 +73,13 @@
     helper_.ReportValidationResult(
         external_validation_value_state,
         external_validation_transaction->GetStoreUMASuffix());
+
+    // TODO(proberge): Call delegate_->OnSplitPreferenceValidation.
   }
 
   if (delegate_) {
-    delegate_->OnSplitPreferenceValidation(
-        pref_path_, dict_value, invalid_keys, value_state,
-        external_validation_value_state, helper_.IsPersonal());
+    delegate_->OnSplitPreferenceValidation(pref_path_, dict_value, invalid_keys,
+                                           value_state, helper_.IsPersonal());
   }
   TrackedPreferenceHelper::ResetAction reset_action =
       helper_.GetAction(value_state);