Fix name shown by devtools for subclasses.

src/api.cc

 // Copyright 2012 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/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 3852 matching lines @@
 
 
 Local<String> v8::Object::ObjectProtoToString() {
   auto context = ContextFromHeapObject(Utils::OpenHandle(this));
   RETURN_TO_LOCAL_UNCHECKED(ObjectProtoToString(context), String);
 }
 
 
 Local<String> v8::Object::GetConstructorName() {
   auto self = Utils::OpenHandle(this);
-  i::Handle<i::String> name(self->constructor_name());
+  i::Handle<i::String> name = i::JSReceiver::GetConstructorName(self);
   return Utils::ToLocal(name);
 }
 
 
 Maybe<bool> v8::Object::Delete(Local<Context> context, Local<Value> key) {
   PREPARE_FOR_EXECUTION_PRIMITIVE(context, "v8::Object::Delete()", bool);
   auto self = Utils::OpenHandle(this);
   auto key_obj = Utils::OpenHandle(*key);
   Maybe<bool> result =
       i::Runtime::DeleteObjectProperty(isolate, self, key_obj, i::SLOPPY);
@@ skipping 4641 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8