[builtins] Begin removing CodeFactory accessors

src/builtins/builtins-object-gen.cc

 // Copyright 2017 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/builtins/builtins-utils-gen.h"
 #include "src/builtins/builtins.h"
 #include "src/code-stub-assembler.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 190 matching lines @@
   Label checkstringtag(this);
   Label if_tostringtag(this), if_notostringtag(this);
 
   Node* receiver = Parameter(Descriptor::kReceiver);
   Node* context = Parameter(Descriptor::kContext);
 
   GotoIf(WordEqual(receiver, UndefinedConstant()), &return_undefined);
 
   GotoIf(WordEqual(receiver, NullConstant()), &return_null);
 
-  Callable to_object = CodeFactory::ToObject(isolate());
-  receiver = CallStub(to_object, context, receiver);
+  receiver = CallBuiltin(Builtins::kToObject, context, receiver);
 
   Node* receiver_instance_type = LoadInstanceType(receiver);
 
   // for proxies, check IsArray before getting @@toStringTag
   VARIABLE(var_proxy_is_array, MachineRepresentation::kTagged);
   var_proxy_is_array.Bind(BooleanConstant(false));
 
   Branch(Word32Equal(receiver_instance_type, Int32Constant(JS_PROXY_TYPE)),
          &if_isproxy, &checkstringtag);
 
@@ skipping 124 matching lines @@
     BIND(&return_object);
     Return(HeapConstant(isolate()->factory()->object_to_string()));
   }
 }
 
 // ES6 #sec-object.prototype.valueof
 TF_BUILTIN(ObjectPrototypeValueOf, CodeStubAssembler) {
   Node* receiver = Parameter(Descriptor::kReceiver);
   Node* context = Parameter(Descriptor::kContext);
 
-  Callable to_object = CodeFactory::ToObject(isolate());
-  receiver = CallStub(to_object, context, receiver);
-
-  Return(receiver);
+  Return(CallBuiltin(Builtins::kToObject, context, receiver));
 }
 
 // ES #sec-object.create
 TF_BUILTIN(ObjectCreate, ObjectBuiltinsAssembler) {
   Node* prototype = Parameter(Descriptor::kPrototype);
   Node* properties = Parameter(Descriptor::kProperties);
   Node* context = Parameter(Descriptor::kContext);
 
   Label call_runtime(this, Label::kDeferred), prototype_valid(this),
       no_properties(this);
@@ skipping 164 matching lines @@
 
   BIND(&runtime);
   {
     Return(CallRuntime(Runtime::kCreateJSGeneratorObject, context, closure,
                        receiver));
   }
 }
 
 }  // namespace internal
 }  // namespace v8