[Invalidations] Add GetInvalidatorState() to Invalidator{,Frontend}

sync/notifier/fake_invalidator_unittest.cc

Index: sync/notifier/fake_invalidator_unittest.cc
diff --git a/sync/notifier/fake_invalidator_unittest.cc b/sync/notifier/fake_invalidator_unittest.cc
index 05b3e0bb2fc6b28ac5f9ddb51f882ced55fbfefe..6b5decc2db4827a1b8c135cf52222fd36c935eac 100644
--- a/sync/notifier/fake_invalidator_unittest.cc
+++ b/sync/notifier/fake_invalidator_unittest.cc
@@ -40,17 +40,13 @@ class FakeInvalidatorTestDelegate {
     // Do Nothing.
   }
 
-  void TriggerOnNotificationsEnabled() {
-    invalidator_->EmitOnNotificationsEnabled();
+  void TriggerOnInvalidatorStateChange(InvalidatorState state) {
+    invalidator_->EmitOnInvalidatorStateChange(state);
   }
 
-  void TriggerOnIncomingNotification(const ObjectIdStateMap& id_state_map,
-                                     IncomingNotificationSource source) {
-    invalidator_->EmitOnIncomingNotification(id_state_map, source);
-  }
-
-  void TriggerOnNotificationsDisabled(NotificationsDisabledReason reason) {
-    invalidator_->EmitOnNotificationsDisabled(reason);
+  void TriggerOnIncomingInvalidation(const ObjectIdStateMap& id_state_map,
+                                     IncomingInvalidationSource source) {
+    invalidator_->EmitOnIncomingInvalidation(id_state_map, source);
   }
 
   static bool InvalidatorHandlesDeprecatedState() {