Don't schedule second pass callbacks if there are no callbacks

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 171623a28fa589981031a505de72a251f23e9a46..18baa087e0228b065b1821d1574cff66a37437ed 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -432,7 +432,10 @@ class WeakCallbackInfo {
     return internal_fields_[1];
   }
 
-  bool IsFirstPass() const { return callback_ != nullptr; }
+  V8_DEPRECATED("Not realiable once SetSecondPassCallback() was used.",
+                bool IsFirstPass() const) {
+    return callback_ != nullptr;
+  }
 
   // When first called, the embedder MUST Reset() the Global which triggered the
   // callback. The Global itself is unusable for anything else. No v8 other api