Add additional error logging to investigate Autocomplete Sync failures.

chrome/browser/sync/glue/password_change_processor.cc

Index: chrome/browser/sync/glue/password_change_processor.cc
diff --git a/chrome/browser/sync/glue/password_change_processor.cc b/chrome/browser/sync/glue/password_change_processor.cc
index ad3572c9a21c489c9e94dfec9f074d8723870166..870d3a344d46fd2e3404cb6f9e4812c86162bd5b 100644
--- a/chrome/browser/sync/glue/password_change_processor.cc
+++ b/chrome/browser/sync/glue/password_change_processor.cc
@@ -82,8 +82,10 @@ void PasswordChangeProcessor::Observe(
     switch (change->type()) {
       case PasswordStoreChange::ADD: {
         sync_api::WriteNode sync_node(&trans);
-        if (sync_node.InitUniqueByCreation(syncable::PASSWORDS,
-                                           password_root, tag)) {
+        sync_api::WriteNode::InitUniqueByCreationResult result =
+            sync_node.InitUniqueByCreation(syncable::PASSWORDS, password_root,
+                                           tag);
+        if (result == sync_api::WriteNode::INIT_SUCCESS) {
           PasswordModelAssociator::WriteToSyncNode(change->form(), &sync_node);
           model_associator_->Associate(&tag, sync_node.GetId());
           break;