[DO NOT LAND] Set @@toStringTag for DOM object prototypes

Source/bindings/tests/results/core/V8TestInterfaceOwnProperties.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file has been auto-generated by code_generator_v8.py. DO NOT MODIFY!
 
 #include "config.h"
 #include "V8TestInterfaceOwnProperties.h"
 
 #include "bindings/core/v8/ExceptionState.h"
@@ skipping 132 matching lines @@
     v8::Local<v8::Signature> defaultSignature;
     defaultSignature = V8DOMConfiguration::installDOMClassTemplate(isolate, functionTemplate, "TestInterfaceOwnProperties", V8TestInterfaceEmpty::domTemplate(isolate), V8TestInterfaceOwnProperties::internalFieldCount,
         V8TestInterfaceOwnPropertiesAttributes, WTF_ARRAY_LENGTH(V8TestInterfaceOwnPropertiesAttributes),
         V8TestInterfaceOwnPropertiesAccessors, WTF_ARRAY_LENGTH(V8TestInterfaceOwnPropertiesAccessors),
         0, 0);
     v8::Local<v8::ObjectTemplate> instanceTemplate = functionTemplate->InstanceTemplate();
     ALLOW_UNUSED_LOCAL(instanceTemplate);
     v8::Local<v8::ObjectTemplate> prototypeTemplate = functionTemplate->PrototypeTemplate();
     ALLOW_UNUSED_LOCAL(prototypeTemplate);
 
+    prototypeTemplate->Set(v8::Symbol::GetToStringTag(isolate), v8AtomicString(isolate, "TestInterfaceOwnProperties"));
+
     // Custom toString template
     functionTemplate->Set(v8AtomicString(isolate, "toString"), V8PerIsolateData::from(isolate)->toStringTemplate());
 }
 
 v8::Local<v8::FunctionTemplate> V8TestInterfaceOwnProperties::domTemplate(v8::Isolate* isolate)
 {
     return V8DOMConfiguration::domClassTemplate(isolate, const_cast<WrapperTypeInfo*>(&wrapperTypeInfo), installV8TestInterfaceOwnPropertiesTemplate);
 }
 
 bool V8TestInterfaceOwnProperties::hasInstance(v8::Local<v8::Value> v8Value, v8::Isolate* isolate)
@@ skipping 15 matching lines @@
 {
     scriptWrappable->toImpl<TestInterfaceOwnProperties>()->ref();
 }
 
 void V8TestInterfaceOwnProperties::derefObject(ScriptWrappable* scriptWrappable)
 {
     scriptWrappable->toImpl<TestInterfaceOwnProperties>()->deref();
 }
 
 } // namespace blink