replace OVERRIDE and FINAL with override and final in sync/

sync/test/trackable_mock_invalidation.h

Index: sync/test/trackable_mock_invalidation.h
diff --git a/sync/test/trackable_mock_invalidation.h b/sync/test/trackable_mock_invalidation.h
index 1ad3697e16fae029b34f4721835108ebc99a3220..56878661dff706405d52553e54d6c492ff776a40 100644
--- a/sync/test/trackable_mock_invalidation.h
+++ b/sync/test/trackable_mock_invalidation.h
@@ -26,10 +26,10 @@ class TrackableMockInvalidation : public MockInvalidation {
 
   // Forwards notice of the acknowledgement of this invalidation to the
   // |tracker_|.
-  virtual void Acknowledge() OVERRIDE;
+  virtual void Acknowledge() override;
 
   // Forwards notice of the drop of this invalidation to the |tracker_|.
-  virtual void Drop() OVERRIDE;
+  virtual void Drop() override;
 
   // Returns the integer used to identify this object with the |tracker_|.
   int GetTrackingId();