Use a different map to distinguish eval contexts

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 38c36e0aac8bfad041303ddff3ed660cbcf296ad..b207d10ee0142739e94fbafbb7a116d373f0cce0 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -787,7 +787,7 @@ bool HeapObject::IsContext() const {
       map == heap->function_context_map() || map == heap->catch_context_map() ||
       map == heap->with_context_map() || map == heap->native_context_map() ||
       map == heap->block_context_map() || map == heap->module_context_map() ||
-      map == heap->script_context_map() ||
+      map == heap->eval_context_map() || map == heap->script_context_map() ||
       map == heap->debug_evaluate_context_map());
 }