Implement Invalidator::Acknowledge

sync/internal_api/sync_manager_impl.cc

Index: sync/internal_api/sync_manager_impl.cc
diff --git a/sync/internal_api/sync_manager_impl.cc b/sync/internal_api/sync_manager_impl.cc
index 0823e713888d7b5ca8388266cbbbef4447b0c003..c63732181e2de1ea8a98c035ddbacb29cc3e52c9 100644
--- a/sync/internal_api/sync_manager_impl.cc
+++ b/sync/internal_api/sync_manager_impl.cc
@@ -681,6 +681,13 @@ void SyncManagerImpl::UnregisterInvalidationHandler(
   invalidator_->UnregisterHandler(handler);
 }
 
+void SyncManagerImpl::AcknowledgeInvalidation(
+    const invalidation::ObjectId& id, const syncer::AckHandle& ack_handle) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(initialized_);
+  invalidator_->Acknowledge(id, ack_handle);
+}
+
 void SyncManagerImpl::AddObserver(SyncManager::Observer* observer) {
   DCHECK(thread_checker_.CalledOnValidThread());
   observers_.AddObserver(observer);
@@ -1278,6 +1285,11 @@ void SyncManagerImpl::OnIncomingInvalidation(
     allstatus_.IncrementNotificationsReceived();
     UpdateNotificationInfo(type_state_map);
     debug_info_event_listener_.OnIncomingNotification(type_state_map);
+    // TODO(dcheng): Acknowledge immediately for now. Fix this logic eventually.
+    for (ObjectIdStateMap::const_iterator it = id_state_map.begin();
+         it != id_state_map.end(); ++it) {
+      invalidator_->Acknowledge(it->first, it->second.ack_handle);
+    }
   } else {
     LOG(WARNING) << "Sync received invalidation without any type information.";
   }