Remove --harmony-tostring runtime flag

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/code-stubs.h"
 #include "src/extensions/externalize-string-extension.h"
@@ skipping 2233 matching lines @@
   HandleScope scope(isolate);
 
 #define INITIALIZE_FLAG(FLAG)                                         \
   {                                                                   \
     Handle<String> name =                                             \
         isolate->factory()->NewStringFromAsciiChecked(#FLAG);         \
     JSObject::AddProperty(container, name,                            \
                           isolate->factory()->ToBoolean(FLAG), NONE); \
   }
 
-  INITIALIZE_FLAG(FLAG_harmony_tostring)
   INITIALIZE_FLAG(FLAG_harmony_species)
 
 #undef INITIALIZE_FLAG
 }
 
 
 #define EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(id) \
   void Genesis::InitializeGlobal_##id() {}
 
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_modules)
@@ skipping 21 matching lines @@
   Handle<String> symbol_string = factory->InternalizeUtf8String("Symbol");
   Handle<JSObject> symbol = Handle<JSObject>::cast(
       JSObject::GetProperty(global, symbol_string).ToHandleChecked());
   Handle<String> name_string = factory->InternalizeUtf8String(name);
   PropertyAttributes attributes =
       static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
   JSObject::AddProperty(symbol, name_string, value, attributes);
 }
 
 
-void Genesis::InitializeGlobal_harmony_tostring() {
-  if (!FLAG_harmony_tostring) return;
-  InstallPublicSymbol(factory(), native_context(), "toStringTag",
-                      factory()->to_string_tag_symbol());
-}
-
-
 void Genesis::InitializeGlobal_harmony_regexp_subclass() {
   if (!FLAG_harmony_regexp_subclass) return;
   InstallPublicSymbol(factory(), native_context(), "match",
                       factory()->match_symbol());
   InstallPublicSymbol(factory(), native_context(), "replace",
                       factory()->replace_symbol());
   InstallPublicSymbol(factory(), native_context(), "search",
                       factory()->search_symbol());
   InstallPublicSymbol(factory(), native_context(), "split",
                       factory()->split_symbol());
@@ skipping 637 matching lines @@
 
   return true;
 }
 
 
 bool Genesis::InstallExperimentalNatives() {
   static const char* harmony_proxies_natives[] = {"native proxy.js", nullptr};
   static const char* harmony_modules_natives[] = {nullptr};
   static const char* harmony_regexps_natives[] = {"native harmony-regexp.js",
                                                   nullptr};
-  static const char* harmony_tostring_natives[] = {nullptr};
   static const char* harmony_iterator_close_natives[] = {nullptr};
   static const char* harmony_sloppy_natives[] = {nullptr};
   static const char* harmony_sloppy_function_natives[] = {nullptr};
   static const char* harmony_sloppy_let_natives[] = {nullptr};
   static const char* harmony_species_natives[] = {"native harmony-species.js",
                                                   nullptr};
   static const char* harmony_tailcalls_natives[] = {nullptr};
   static const char* harmony_unicode_regexps_natives[] = {
       "native harmony-unicode-regexps.js", nullptr};
   static const char* harmony_reflect_natives[] = {"native harmony-reflect.js",
@@ skipping 684 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8