[runtime] Avoid @@isConcatSpreadable lookup for fast path Array.prototype.concat

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index 3226828c2210436afae35a0440bc489d349aa705..c4806e39ebe9bcd17067a05dd8f32643b8a2fe91 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -189,6 +189,8 @@ using v8::MemoryPressureLevel;
   V(ArrayList, retained_maps, RetainedMaps)                                    \
   V(WeakHashTable, weak_object_to_code_table, WeakObjectToCodeTable)           \
   V(PropertyCell, array_protector, ArrayProtector)                             \
+  V(PropertyCell, array_is_concat_spreadable_protector,                        \
+    ArrayIsConcatSpreadableProtector)                                          \
   V(PropertyCell, empty_property_cell, EmptyPropertyCell)                      \
   V(Object, weak_stack_trace_list, WeakStackTraceList)                         \
   V(Object, noscript_shared_function_infos, NoScriptSharedFunctionInfos)       \