Implement Invalidator::Acknowledge

sync/notifier/invalidation_state_tracker.cc

Index: sync/notifier/invalidation_state_tracker.cc
diff --git a/sync/api/sync_error_factory.cc b/sync/notifier/invalidation_state_tracker.cc
similarity index 52%
copy from sync/api/sync_error_factory.cc
copy to sync/notifier/invalidation_state_tracker.cc
index 11888fff8a025d9450f9e83ea2e8721adae7d020..882c98554bf9938fd308c71acb56e996af81d035 100644
--- a/sync/api/sync_error_factory.cc
+++ b/sync/notifier/invalidation_state_tracker.cc
@@ -2,14 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "sync/api/sync_error_factory.h"
+#include "sync/notifier/invalidation_state_tracker.h"
 
 namespace syncer {
 
-SyncErrorFactory::SyncErrorFactory() {
+LocalState::LocalState()
+    : expected(AckHandle::InvalidAckHandle()),
+      current(AckHandle::InvalidAckHandle()) {
 }
 
-SyncErrorFactory::~SyncErrorFactory() {
+LocalState::~LocalState() {
 }
 
 }  // namespace syncer