Vector ICs: Like megamorphic keyed koads, use a dummy vector for stores

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index 3f6d8267b3224ba2e1161129ee6c6416cdfe386b..a57a46d85edd6c351bc66be96d192271b6be3578 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -187,6 +187,7 @@ namespace internal {
   V(FixedArray, allocation_sites_scratchpad, AllocationSitesScratchpad)        \
   V(FixedArray, microtask_queue, MicrotaskQueue)                               \
   V(FixedArray, keyed_load_dummy_vector, KeyedLoadDummyVector)                 \
+  V(FixedArray, keyed_store_dummy_vector, KeyedStoreDummyVector)               \
   V(FixedArray, detached_contexts, DetachedContexts)                           \
   V(ArrayList, retained_maps, RetainedMaps)                                    \
   V(WeakHashTable, weak_object_to_code_table, WeakObjectToCodeTable)           \