Add unique hashing to sync API.

chrome/browser/sync/glue/preference_model_associator.cc

 // Copyright (c) 2010 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/preference_model_associator.h"
 
 #include "base/json/json_reader.h"
 #include "base/logging.h"
 #include "base/values.h"
 #include "chrome/browser/profile.h"
@@ skipping 33 matching lines @@
                << "might be running against an out-of-date server.";
     return false;
   }
 
   base::JSONReader reader;
   for (std::set<std::wstring>::iterator it = synced_preferences_.begin();
        it != synced_preferences_.end(); ++it) {
     std::string tag = WideToUTF8(*it);
 
     sync_api::ReadNode node(&trans);
-    if (node.InitByClientTagLookup(tag)) {
+    if (node.InitByClientTagLookup(syncable::PREFERENCES, tag)) {
       const sync_pb::PreferenceSpecifics& preference(
           node.GetPreferenceSpecifics());
       DCHECK_EQ(tag, preference.name());
 
       scoped_ptr<Value> value(
           reader.JsonToValue(preference.value(), false, false));
       std::wstring pref_name = UTF8ToWide(preference.name());
       if (!value.get()) {
         LOG(ERROR) << "Failed to deserialize preference value: "
                    << reader.error_message();
@@ skipping 149 matching lines @@
       sync_service_->OnUnrecoverableError();
       return;
     }
     // TODO(sync): Make ExternalId a string?
     // sync_node.SetExternalId(id_map_inverse_[*iter]);
   }
   dirty_associations_sync_ids_.clear();
 }
 
 }  // namespace browser_sync