[builtins] Begin removing CodeFactory accessors

src/builtins/builtins-number-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"
 #include "src/ic/binary-op-assembler.h"
 
 namespace v8 {
@@ skipping 234 matching lines @@
           Return(SmiConstant(0));
 
           BIND(&if_inputisnotzero);
           Return(input);
         }
 
         BIND(&if_inputisnotnumber);
         {
           // Need to convert the {input} to String first.
           // TODO(bmeurer): This could be more efficient if necessary.
-          Callable callable = CodeFactory::ToString(isolate());
-          var_input.Bind(CallStub(callable, context, input));
+          var_input.Bind(CallBuiltin(Builtins::kToString, context, input));
           Goto(&loop);
         }
       }
     }
   }
 }
 
 // ES6 #sec-number.parseint
 TF_BUILTIN(NumberParseInt, CodeStubAssembler) {
   Node* context = Parameter(Descriptor::kContext);
@@ skipping 1176 matching lines @@
   Node* right = Parameter(Descriptor::kRight);
   Node* slot = Parameter(Descriptor::kSlot);
   Node* vector = Parameter(Descriptor::kVector);
 
   Return(Generate_ModulusWithFeedback(context, left, right,
                                       ChangeUint32ToWord(slot), vector));
 }
 
 }  // namespace internal
 }  // namespace v8