Rename SyncNotifier->Invalidator and SyncNotifierObserver->InvalidationHandler.

sync/notifier/fake_invalidation_handler.h

Index: sync/notifier/fake_invalidation_handler.h
diff --git a/sync/notifier/fake_sync_notifier_observer.h b/sync/notifier/fake_invalidation_handler.h
similarity index 83%
rename from sync/notifier/fake_sync_notifier_observer.h
rename to sync/notifier/fake_invalidation_handler.h
index e1195d9be4691050e65bbccf5427eb7a1da02be2..1d9dcfbdf79e8cb3947034a8226379c8dd70efe5 100644
--- a/sync/notifier/fake_sync_notifier_observer.h
+++ b/sync/notifier/fake_invalidation_handler.h
@@ -8,21 +8,21 @@
 #include <string>
 
 #include "base/compiler_specific.h"
-#include "sync/notifier/sync_notifier_observer.h"
+#include "sync/notifier/invalidation_handler.h"
 
 namespace syncer {
 
-class FakeSyncNotifierObserver : public SyncNotifierObserver {
+class FakeInvalidationHandler : public InvalidationHandler {
  public:
-  FakeSyncNotifierObserver();
-  virtual ~FakeSyncNotifierObserver();
+  FakeInvalidationHandler();
+  virtual ~FakeInvalidationHandler();
 
   NotificationsDisabledReason GetNotificationsDisabledReason() const;
   const ObjectIdStateMap& GetLastNotificationIdStateMap() const;
   IncomingNotificationSource GetLastNotificationSource() const;
   int GetNotificationCount() const;
 
-  // SyncNotifierObserver implementation.
+  // InvalidationHandler implementation.
   virtual void OnNotificationsEnabled() OVERRIDE;
   virtual void OnNotificationsDisabled(
       NotificationsDisabledReason reason) OVERRIDE;