[turbofan] Introduce a dedicated Array type.

src/compiler/js-create-lowering.cc

Index: src/compiler/js-create-lowering.cc
diff --git a/src/compiler/js-create-lowering.cc b/src/compiler/js-create-lowering.cc
index bde59c48ec510611b9f9e7d63a6c1c2803360306..5869234ec35d8b0c817de1805878a4608cdf68df 100644
--- a/src/compiler/js-create-lowering.cc
+++ b/src/compiler/js-create-lowering.cc
@@ -1216,7 +1216,7 @@ Node* JSCreateLowering::AllocateFastLiteral(
   // Actually allocate and initialize the object.
   AllocationBuilder builder(jsgraph(), effect, control);
   builder.Allocate(boilerplate_map->instance_size(), pretenure,
-                   Type::OtherObject());
+                   Type::For(boilerplate_map));
   builder.Store(AccessBuilder::ForMap(), boilerplate_map);
   builder.Store(AccessBuilder::ForJSObjectProperties(), properties);
   builder.Store(AccessBuilder::ForJSObjectElements(), elements);