Decomped registration logic into its own class.

chrome/browser/sync/notifier/invalidation_util.h

 // 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.
 //
 // Various utilities for dealing with invalidation data types.
 
 #ifndef CHROME_BROWSER_SYNC_NOTIFIER_INVALIDATION_UTIL_H_
 #define CHROME_BROWSER_SYNC_NOTIFIER_INVALIDATION_UTIL_H_
 
 #include <string>
 
+#include "chrome/browser/sync/syncable/model_type.h"
 #include "google/cacheinvalidation/invalidation-client.h"
 
 namespace sync_notifier {
 
 void RunAndDeleteClosure(invalidation::Closure* task);
 
+bool RealModelTypeToObjectId(syncable::ModelType model_type,
+                             invalidation::ObjectId* object_id);
+
+bool ObjectIdToRealModelType(const invalidation::ObjectId& object_id,
+                             syncable::ModelType* model_type);
+
 // We need to write our own protobuf-to-string functions because we
 // use LITE_RUNTIME, which doesn't support DebugString().
 
 std::string ObjectIdToString(const invalidation::ObjectId& object_id);
 
 std::string StatusToString(const invalidation::Status& status);
 
 std::string InvalidationToString(
     const invalidation::Invalidation& invalidation);
 
 std::string RegistrationUpdateToString(
     const invalidation::RegistrationUpdate& update);
 
 std::string RegistrationUpdateResultToString(
     const invalidation::RegistrationUpdateResult& update_result);
 
 }  // namespace sync_notifier
 
 #endif  // CHROME_BROWSER_SYNC_NOTIFIER_INVALIDATION_UTIL_H_