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

src/heap/incremental-marking.cc

Index: src/heap/incremental-marking.cc
diff --git a/src/heap/incremental-marking.cc b/src/heap/incremental-marking.cc
index 0f45c7a02e1846a2e7d231354bafbc516ee15780..c250b90b1c99d260be6ae137d212ca02bc97db35 100644
--- a/src/heap/incremental-marking.cc
+++ b/src/heap/incremental-marking.cc
@@ -942,7 +942,7 @@ void IncrementalMarking::Hurry() {
         MemoryChunk::IncrementLiveBytesFromGC(cache, cache->Size());
       }
     }
-    context = Context::cast(context)->get(Context::NEXT_CONTEXT_LINK);
+    context = Context::cast(context)->next_context_link();
   }
 }