Rename ModelType/ObjectIdStateMap to InvalidationMap.

sync/notifier/invalidation_notifier.cc

Index: sync/notifier/invalidation_notifier.cc
diff --git a/sync/notifier/invalidation_notifier.cc b/sync/notifier/invalidation_notifier.cc
index aaab3685d2d51f338f0e90eb66e0243ee56f17af..9aaf0687d15fc52e71b767ac174ac4a3e638b521 100644
--- a/sync/notifier/invalidation_notifier.cc
+++ b/sync/notifier/invalidation_notifier.cc
@@ -100,14 +100,16 @@ void InvalidationNotifier::UpdateCredentials(
 }
 
 void InvalidationNotifier::SendInvalidation(
-    const ObjectIdStateMap& id_state_map) {
+    const ObjectIdInvalidationMap& invalidation_map) {
   DCHECK(CalledOnValidThread());
   // Do nothing.
 }
 
-void InvalidationNotifier::OnInvalidate(const ObjectIdStateMap& id_state_map) {
+void InvalidationNotifier::OnInvalidate(
+    const ObjectIdInvalidationMap& invalidation_map) {
   DCHECK(CalledOnValidThread());
-  registrar_.DispatchInvalidationsToHandlers(id_state_map, REMOTE_INVALIDATION);
+  registrar_.DispatchInvalidationsToHandlers(invalidation_map,
+                                             REMOTE_INVALIDATION);
 }
 
 void InvalidationNotifier::OnInvalidatorStateChange(InvalidatorState state) {