Revert of [regexp] Port RegExpConstructor

src/bootstrapper.cc

 // Copyright 2014 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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/ieee754.h"
 #include "src/code-stubs.h"
@@ skipping 1559 matching lines @@
     to_primitive->shared()->set_internal_formal_parameter_count(1);
 
     // Set the length for the function to satisfy ECMA-262.
     to_primitive->shared()->set_length(1);
   }
 
   {  // -- R e g E x p
     // Builtin functions for RegExp.prototype.
     Handle<JSFunction> regexp_fun = InstallFunction(
         global, "RegExp", JS_REGEXP_TYPE, JSRegExp::kSize,
-        isolate->initial_object_prototype(), Builtins::kRegExpConstructor);
+        isolate->initial_object_prototype(), Builtins::kIllegal);
     InstallWithIntrinsicDefaultProto(isolate, regexp_fun,
                                      Context::REGEXP_FUNCTION_INDEX);
-
-    Handle<SharedFunctionInfo> shared(regexp_fun->shared(), isolate);
-    shared->SetConstructStub(*isolate->builtins()->RegExpConstructor());
-    shared->set_instance_class_name(isolate->heap()->RegExp_string());
-    shared->DontAdaptArguments();
-    shared->set_length(2);
-
-    Handle<JSObject> proto =
-        factory->NewJSObject(isolate->object_function(), TENURED);
-    JSObject::AddProperty(proto, factory->constructor_string(), regexp_fun,
-                          DONT_ENUM);
-    Accessors::FunctionSetPrototype(regexp_fun, proto).Assert();
+    regexp_fun->shared()->SetConstructStub(
+        *isolate->builtins()->JSBuiltinsConstructStub());
 
     DCHECK(regexp_fun->has_initial_map());
     Handle<Map> initial_map(regexp_fun->initial_map());
 
     DCHECK_EQ(0, initial_map->GetInObjectProperties());
 
     Map::EnsureDescriptorSlack(initial_map, 1);
 
     // ECMA-262, section 15.10.7.5.
     PropertyAttributes writable =
@@ skipping 2530 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8