Remove JSBuiltinsObject.

src/heap/heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/bits.h"
 #include "src/base/once.h"
@@ skipping 3439 matching lines @@
 
 AllocationResult Heap::AllocateJSObjectFromMap(
     Map* map, PretenureFlag pretenure, AllocationSite* allocation_site) {
   // JSFunctions should be allocated using AllocateFunction to be
   // properly initialized.
   DCHECK(map->instance_type() != JS_FUNCTION_TYPE);
 
   // Both types of global objects should be allocated using
   // AllocateGlobalObject to be properly initialized.
   DCHECK(map->instance_type() != JS_GLOBAL_OBJECT_TYPE);
-  DCHECK(map->instance_type() != JS_BUILTINS_OBJECT_TYPE);
 
   // Allocate the backing storage for the properties.
   FixedArray* properties = empty_fixed_array();
 
   // Allocate the JSObject.
   AllocationSpace space = SelectSpace(pretenure);
   JSObject* js_obj = nullptr;
   AllocationResult allocation = Allocate(map, space, allocation_site);
   if (!allocation.To(&js_obj)) return allocation;
 
@@ skipping 2653 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8