Fix V8 bindings for named constructors to set prototype object correctly

third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceConstructor.cpp

Index: third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceConstructor.cpp
diff --git a/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceConstructor.cpp b/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceConstructor.cpp
index 0a46fdaba5a704908650023e44b801beb369c7ce..e357756448f25fa238a7f2a4bc074de8fb6c1fb8 100644
--- a/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceConstructor.cpp
+++ b/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceConstructor.cpp
@@ -365,6 +365,41 @@ v8::Local<v8::FunctionTemplate> V8TestInterfaceConstructorConstructor::domTempla
   return result;
 }
 
+void V8TestInterfaceConstructorConstructor::NamedConstructorAttributeGetter(
+    v8::Local<v8::Name> propertyName,
+    const v8::PropertyCallbackInfo<v8::Value>& info) {
+  ExceptionState exceptionState(info.GetIsolate(), ExceptionState::ConstructionContext, "TestInterfaceConstructor");
+  v8::Local<v8::Value> data = info.Data();
+  DCHECK(data->IsExternal());
+  V8PerContextData* perContextData =
+      V8PerContextData::from(info.Holder()->CreationContext());
+  if (!perContextData)
+    return;
+
+  v8::Local<v8::Function> namedConstructorInterface = perContextData->constructorForType(WrapperTypeInfo::unwrap(data));
+  v8::Local<v8::Function> interface = perContextData->constructorForType(&V8TestInterfaceConstructor::wrapperTypeInfo);
+
+  // Set the prototype of named constructors to the regular constructor.
+  v8::Local<v8::Context> context = info.GetIsolate()->GetCurrentContext();
+  auto privateProperty = V8PrivateProperty::getNamedConstructorInitialized(info.GetIsolate());
+  v8::Local<v8::Value> privateValue = privateProperty.get(context, namedConstructorInterface);
+  if (privateValue.IsEmpty()) {
+    v8::MaybeLocal<v8::Value> interfacePrototype = interface->Get(context, v8AtomicString(info.GetIsolate(), "prototype"));
+    if (interfacePrototype.IsEmpty())
+      exceptionState.throwTypeError("Could not get prototype for V8TestInterfaceConstructor.");
+
+    v8::Maybe<bool> setResult = namedConstructorInterface->Set(context, v8AtomicString(info.GetIsolate(), "prototype"), interfacePrototype.ToLocalChecked());
+    if (setResult.IsNothing() || setResult.ToChecked() != true) {
+      exceptionState.throwTypeError("Could not set prototype for TestInterfaceConstructor.");
+    }
+
+    privateProperty.set(context, namedConstructorInterface, v8::True(info.GetIsolate()));
+  }
+
+  v8SetReturnValue(
+      info, perContextData->constructorForType(WrapperTypeInfo::unwrap(data)));
+}
+
 void V8TestInterfaceConstructor::constructorCallback(const v8::FunctionCallbackInfo<v8::Value>& info) {
   UseCounter::count(currentExecutionContext(info.GetIsolate()), UseCounter::TestFeature);
   if (!info.IsConstructCall()) {