Rewrite Object.prototype.toString in C++

src/runtime/runtime-internal.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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/ast/prettyprinter.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 350 matching lines @@
   DCHECK(args.length() == 1);
   CONVERT_ARG_CHECKED(String, name, 0);
 
   if (FLAG_native_code_counters) {
     StatsCounter(isolate, name->ToCString().get()).Increment();
   }
   return isolate->heap()->undefined_value();
 }
 
 
-RUNTIME_FUNCTION(Runtime_HarmonyToString) {
-  // TODO(caitp): Delete this runtime method when removing --harmony-tostring
-  return isolate->heap()->ToBoolean(FLAG_harmony_tostring);
-}
-
-
 namespace {
 
 bool ComputeLocation(Isolate* isolate, MessageLocation* target) {
   JavaScriptFrameIterator it(isolate);
   if (!it.done()) {
     JavaScriptFrame* frame = it.frame();
     JSFunction* fun = frame->function();
     Object* script = fun->shared()->script();
     if (script->IsScript() &&
         !(Script::cast(script)->source()->IsUndefined())) {
@@ skipping 51 matching lines @@
   HandleScope scope(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
   Handle<String> callsite = RenderCallSite(isolate, object);
   THROW_NEW_ERROR_RETURN_FAILURE(
       isolate, NewTypeError(MessageTemplate::kNotConstructor, callsite));
 }
 
 }  // namespace internal
 }  // namespace v8