[regexp] Move RegExp.prototype.test to TF

src/regexp/regexp-utils.cc

 // Copyright 2016 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/regexp/regexp-utils.h"
 
 #include "src/factory.h"
 #include "src/isolate.h"
 #include "src/objects-inl.h"
 #include "src/regexp/jsregexp.h"
@@ skipping 54 matching lines @@
 // ES#sec-regexpexec Runtime Semantics: RegExpExec ( R, S )
 // Also takes an optional exec method in case our caller
 // has already fetched exec.
 MaybeHandle<Object> RegExpUtils::RegExpExec(Isolate* isolate,
                                             Handle<JSReceiver> regexp,
                                             Handle<String> string,
                                             Handle<Object> exec) {
   if (exec->IsUndefined(isolate)) {
     ASSIGN_RETURN_ON_EXCEPTION(
         isolate, exec,
-        Object::GetProperty(
-            regexp, isolate->factory()->NewStringFromAsciiChecked("exec")),
-        Object);
+        Object::GetProperty(regexp, isolate->factory()->exec_string()), Object);
   }
 
   if (exec->IsCallable()) {
     const int argc = 1;
     ScopedVector<Handle<Object>> argv(argc);
     argv[0] = string;
 
     Handle<Object> result;
     ASSIGN_RETURN_ON_EXCEPTION(
         isolate, result,
@@ skipping 97 matching lines @@
 
   const int last_index = Handle<Smi>::cast(last_index_obj)->value();
   const int new_last_index =
       AdvanceStringIndex(isolate, string, last_index, unicode);
 
   return SetLastIndex(isolate, regexp, new_last_index);
 }
 
 }  // namespace internal
 }  // namespace v8