[stubs] Unify (and optimize) implementation of ToObject.

src/runtime/runtime-symbol.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/v8.h"
 
 #include "src/arguments.h"
 #include "src/runtime/runtime-utils.h"
 
 namespace v8 {
@@ skipping 33 matching lines @@
                                      Object::GetProperty(privates, name));
   if (!symbol->IsSymbol()) {
     DCHECK(symbol->IsUndefined());
     symbol = isolate->factory()->NewPrivateSymbol(name);
     JSObject::AddProperty(Handle<JSObject>::cast(privates), name, symbol, NONE);
   }
   return *symbol;
 }
 
 
-RUNTIME_FUNCTION(Runtime_NewSymbolWrapper) {
-  HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
-  CONVERT_ARG_HANDLE_CHECKED(Symbol, symbol, 0);
-  return *Object::ToObject(isolate, symbol).ToHandleChecked();
-}
-
-
 RUNTIME_FUNCTION(Runtime_SymbolDescription) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_CHECKED(Symbol, symbol, 0);
   return symbol->name();
 }
 
 
 RUNTIME_FUNCTION(Runtime_SymbolRegistry) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 0);
   return *isolate->GetSymbolRegistry();
 }
 
 
 RUNTIME_FUNCTION(Runtime_SymbolIsPrivate) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_CHECKED(Symbol, symbol, 0);
   return isolate->heap()->ToBoolean(symbol->is_private());
 }
 }  // namespace internal
 }  // namespace v8