Add additional error logging to investigate Autocomplete Sync failures.

chrome/browser/sync/glue/theme_model_associator.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/glue/theme_model_associator.h"
 
 #include "base/basictypes.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/utf_string_conversions.h"
@@ skipping 50 matching lines @@
     // TODO(akalin): If the sync data does not have
     // use_system_theme_by_default and we do, update that flag on the
     // sync data.
     sync_pb::ThemeSpecifics theme_specifics = node.GetThemeSpecifics();
     if (UpdateThemeSpecificsOrSetCurrentThemeIfNecessary(profile,
                                                          &theme_specifics))
       node.SetThemeSpecifics(theme_specifics);
   } else {
     // Set the sync data from the current theme.
     sync_api::WriteNode node(&trans);
-    if (!node.InitUniqueByCreation(syncable::THEMES, root,
-                                   kCurrentThemeClientTag)) {
+    sync_api::WriteNode::InitUniqueByCreationResult result =
+        node.InitUniqueByCreation(syncable::THEMES, root,
+                                  kCurrentThemeClientTag);
+    if (result != sync_api::WriteNode::INIT_SUCCESS) {
       return error_handler_->CreateAndUploadError(
           FROM_HERE,
           "Could not create current theme node.",
           model_type());
     }
     node.SetIsFolder(false);
     node.SetTitle(UTF8ToWide(kCurrentThemeNodeTitle));
     sync_pb::ThemeSpecifics theme_specifics;
     GetThemeSpecificsFromCurrentTheme(profile, &theme_specifics);
     node.SetThemeSpecifics(theme_specifics);
@@ skipping 24 matching lines @@
 bool ThemeModelAssociator::CryptoReadyIfNecessary() {
   // We only access the cryptographer while holding a transaction.
   sync_api::ReadTransaction trans(FROM_HERE, sync_service_->GetUserShare());
   const syncable::ModelTypeSet encrypted_types =
       sync_api::GetEncryptedTypes(&trans);
   return !encrypted_types.Has(syncable::THEMES) ||
          sync_service_->IsCryptographerReady(&trans);
 }
 
 }  // namespace browser_sync