Remove JSBuiltinsObject.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index d16b0e2b72091fcda20e6a6c9a04f205f67b6410..dd12453dd8a1c6291cd167f7eeb914a0e6212558 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -1017,7 +1017,6 @@ bool Object::IsGlobalObject() const {
 
 
 TYPE_CHECKER(JSGlobalObject, JS_GLOBAL_OBJECT_TYPE)
-TYPE_CHECKER(JSBuiltinsObject, JS_BUILTINS_OBJECT_TYPE)
 
 
 bool Object::IsUndetectableObject() const {
@@ -2147,8 +2146,6 @@ int JSObject::GetHeaderSize() {
       return JSGlobalProxy::kSize;
     case JS_GLOBAL_OBJECT_TYPE:
       return JSGlobalObject::kSize;
-    case JS_BUILTINS_OBJECT_TYPE:
-      return JSBuiltinsObject::kSize;
     case JS_FUNCTION_TYPE:
       return JSFunction::kSize;
     case JS_VALUE_TYPE:
@@ -3314,7 +3311,6 @@ CAST_ACCESSOR(Int8x16)
 CAST_ACCESSOR(JSArray)
 CAST_ACCESSOR(JSArrayBuffer)
 CAST_ACCESSOR(JSArrayBufferView)
-CAST_ACCESSOR(JSBuiltinsObject)
 CAST_ACCESSOR(JSDataView)
 CAST_ACCESSOR(JSDate)
 CAST_ACCESSOR(JSFunction)
@@ -4925,7 +4921,7 @@ bool Map::IsJSGlobalObjectMap() {
 bool Map::IsJSTypedArrayMap() { return instance_type() == JS_TYPED_ARRAY_TYPE; }
 bool Map::IsGlobalObjectMap() {
   const InstanceType type = instance_type();
-  return type == JS_GLOBAL_OBJECT_TYPE || type == JS_BUILTINS_OBJECT_TYPE;
+  return type == JS_GLOBAL_OBJECT_TYPE;
 }
 
 
@@ -5626,7 +5622,6 @@ ACCESSORS(JSFunction, shared, SharedFunctionInfo, kSharedFunctionInfoOffset)
 ACCESSORS(JSFunction, literals_or_bindings, FixedArray, kLiteralsOffset)
 ACCESSORS(JSFunction, next_function_link, Object, kNextFunctionLinkOffset)
 
-ACCESSORS(GlobalObject, builtins, JSBuiltinsObject, kBuiltinsOffset)
 ACCESSORS(GlobalObject, native_context, Context, kNativeContextOffset)
 ACCESSORS(GlobalObject, global_proxy, JSObject, kGlobalProxyOffset)