[Sync] Avoid unregistering object IDs on shutdown

sync/notifier/invalidation_notifier_unittest.cc

Index: sync/notifier/invalidation_notifier_unittest.cc
diff --git a/sync/notifier/invalidation_notifier_unittest.cc b/sync/notifier/invalidation_notifier_unittest.cc
index 4a076789b5501237b9b4c63c19a405ea45de2ffe..a1ec5f80e03d6a2ab0c5e01b6c6dda7ec05a1989 100644
--- a/sync/notifier/invalidation_notifier_unittest.cc
+++ b/sync/notifier/invalidation_notifier_unittest.cc
@@ -33,12 +33,10 @@ class InvalidationNotifierTest : public testing::Test {
       ResetNotifier();
   }
 
-  // Constructs an InvalidationNotifier, places it in
-  // |invalidation_notifier_|, and adds |mock_observer_| as an observer. This
-  // remains in place until either TearDown (automatic) or ResetNotifier
-  // (manual) is called.
-  void CreateAndObserveNotifier(
-      const std::string& initial_invalidation_state) {
+  // Constructs an InvalidationNotifier and places it in
+  // |invalidation_notifier_|. This remains in place until either TearDown
+  // (automatic) or ResetNotifier (manual) is called.
+  void CreateNotifier(const std::string& initial_invalidation_state) {
     notifier::NotifierOptions notifier_options;
     // Note: URLRequestContextGetters are ref-counted.
     notifier_options.request_context_getter =
@@ -50,10 +48,11 @@ class InvalidationNotifierTest : public testing::Test {
             initial_invalidation_state,
             MakeWeakHandle(mock_tracker_.AsWeakPtr()),
             "fake_client_info"));
+    invalidation_notifier_->RegisterHandler(&mock_observer_);
   }
 
   void ResetNotifier() {
-    invalidation_notifier_->UpdateRegisteredIds(&mock_observer_, ObjectIdSet());
+    invalidation_notifier_->UnregisterHandler(&mock_observer_);
     // Stopping the invalidation notifier stops its scheduler, which deletes any
     // pending tasks without running them.  Some tasks "run and delete" another
     // task, so they must be run in order to avoid leaking the inner task.
@@ -71,13 +70,11 @@ class InvalidationNotifierTest : public testing::Test {
 };
 
 TEST_F(InvalidationNotifierTest, Basic) {
-  CreateAndObserveNotifier("fake_state");
   InSequence dummy;
 
-  ModelTypeSet models(PREFERENCES, BOOKMARKS, AUTOFILL);
-  invalidation_notifier_->UpdateRegisteredIds(
-      &mock_observer_, ModelTypeSetToObjectIdSet(models));
+  CreateNotifier("fake_state");
 
+  const ModelTypeSet models(PREFERENCES, BOOKMARKS, AUTOFILL);
   const ModelTypePayloadMap& type_payloads =
       ModelTypePayloadMapFromEnumSet(models, "payload");
   EXPECT_CALL(mock_observer_, OnNotificationsEnabled());
@@ -88,6 +85,10 @@ TEST_F(InvalidationNotifierTest, Basic) {
               OnNotificationsDisabled(TRANSIENT_NOTIFICATION_ERROR));
   EXPECT_CALL(mock_observer_,
               OnNotificationsDisabled(NOTIFICATION_CREDENTIALS_REJECTED));
+
+  invalidation_notifier_->UpdateRegisteredIds(
+      &mock_observer_, ModelTypeSetToObjectIdSet(models));
+
   // Note no expectation on mock_tracker_, as we initialized with
   // non-empty initial_invalidation_state above.
 
@@ -109,9 +110,10 @@ TEST_F(InvalidationNotifierTest, Basic) {
 }
 
 TEST_F(InvalidationNotifierTest, MigrateState) {
-  CreateAndObserveNotifier(std::string());
   InSequence dummy;
 
+  CreateNotifier(std::string());
+
   EXPECT_CALL(mock_tracker_, SetInvalidationState("fake_state"));
   invalidation_notifier_->SetStateDeprecated("fake_state");
 
@@ -121,7 +123,7 @@ TEST_F(InvalidationNotifierTest, MigrateState) {
   // Pretend Chrome shut down.
   ResetNotifier();
 
-  CreateAndObserveNotifier("fake_state");
+  CreateNotifier("fake_state");
   // Should do nothing.
   invalidation_notifier_->SetStateDeprecated("more_spurious_fake_state");
 }