[Sync] Convert notifications for UNKNOWN to notifications for everything

chrome/browser/sync/notifier/server_notifier_thread.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/notifier/server_notifier_thread.h"
 
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 48 matching lines @@
 
 void ServerNotifierThread::SendNotification(
     const OutgoingNotificationData& data) {
   DCHECK_EQ(MessageLoop::current(), parent_message_loop_);
   NOTREACHED() << "Shouldn't send notifications if ServerNotifierThread is "
                   "used";
 }
 
 void ServerNotifierThread::OnInvalidate(syncable::ModelType model_type) {
   DCHECK_EQ(MessageLoop::current(), worker_message_loop());
-  // TODO(akalin): This is a hack to make new sync data types work
-  // with server-issued notifications.  Remove this when it's not
-  // needed anymore.
-  VLOG(1) << "OnInvalidate: " << ((model_type == syncable::UNSPECIFIED) ?
-      "UNKNOWN" : syncable::ModelTypeToString(model_type));
+  DCHECK_GE(model_type, syncable::FIRST_REAL_MODEL_TYPE);
+  DCHECK_LT(model_type, syncable::MODEL_TYPE_COUNT);
+  VLOG(1) << "OnInvalidate: " << syncable::ModelTypeToString(model_type);
 
   syncable::ModelTypeBitSet model_types;
   model_types[model_type] = true;
   IncomingNotificationData notification_data;
   notification_data.service_specific_data = model_types.to_string();
   observers_->Notify(&Observer::OnIncomingNotification, notification_data);
 }
 
 void ServerNotifierThread::OnInvalidateAll() {
   DCHECK_EQ(MessageLoop::current(), worker_message_loop());
@@ skipping 45 matching lines @@
   chrome_invalidation_client_->RegisterTypes();
   observers_->Notify(&Observer::OnSubscriptionStateChange, true);
 }
 
 void ServerNotifierThread::StopInvalidationListener() {
   DCHECK_EQ(MessageLoop::current(), worker_message_loop());
   chrome_invalidation_client_.reset();
 }
 
 }  // namespace sync_notifier