Fix V8 bindings for named constructors to set prototype object correctly

third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceEventTarget.cpp

Index: third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceEventTarget.cpp
diff --git a/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceEventTarget.cpp b/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceEventTarget.cpp
index 4599e4c503401dbbb7ca3c5893d269ca12cb3035..c2df1b6dbe86520a26ca9ada6ea5f1ec1afa4574 100644
--- a/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceEventTarget.cpp
+++ b/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceEventTarget.cpp
@@ -15,6 +15,7 @@
 #include "bindings/core/v8/GeneratedCodeHelper.h"
 #include "bindings/core/v8/V8DOMConfiguration.h"
 #include "bindings/core/v8/V8ObjectConstructor.h"
+#include "bindings/core/v8/V8PrivateProperty.h"
 #include "core/dom/Document.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "wtf/GetPtr.h"
@@ -61,7 +62,7 @@ namespace TestInterfaceEventTargetV8Internal {
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wglobal-constructors"
 #endif
-const WrapperTypeInfo V8TestInterfaceEventTargetConstructor::wrapperTypeInfo = { gin::kEmbedderBlink, V8TestInterfaceEventTargetConstructor::domTemplate, V8TestInterfaceEventTarget::trace, V8TestInterfaceEventTarget::traceWrappers, 0, nullptr, "TestInterfaceEventTarget", 0, WrapperTypeInfo::WrapperTypeObjectPrototype, WrapperTypeInfo::ObjectClassId, WrapperTypeInfo::NotInheritFromActiveScriptWrappable, WrapperTypeInfo::InheritFromEventTarget, WrapperTypeInfo::Independent };
+const WrapperTypeInfo V8TestInterfaceEventTargetConstructor::wrapperTypeInfo = { gin::kEmbedderBlink, V8TestInterfaceEventTargetConstructor::domTemplate, V8TestInterfaceEventTarget::trace, V8TestInterfaceEventTarget::traceWrappers, 0, nullptr, "TestInterfaceEventTarget", &V8EventTarget::wrapperTypeInfo, WrapperTypeInfo::WrapperTypeObjectPrototype, WrapperTypeInfo::ObjectClassId, WrapperTypeInfo::NotInheritFromActiveScriptWrappable, WrapperTypeInfo::InheritFromEventTarget, WrapperTypeInfo::Independent };
 #if defined(COMPONENT_BUILD) && defined(WIN32) && COMPILER(CLANG)
 #pragma clang diagnostic pop
 #endif
@@ -94,12 +95,39 @@ v8::Local<v8::FunctionTemplate> V8TestInterfaceEventTargetConstructor::domTempla
   result = v8::FunctionTemplate::New(isolate, V8TestInterfaceEventTargetConstructorCallback);
   v8::Local<v8::ObjectTemplate> instanceTemplate = result->InstanceTemplate();
   instanceTemplate->SetInternalFieldCount(V8TestInterfaceEventTarget::internalFieldCount);
-  result->SetClassName(v8AtomicString(isolate, "TestInterfaceEventTarget"));
+  result->SetClassName(v8AtomicString(isolate, "Name"));
   result->Inherit(V8TestInterfaceEventTarget::domTemplate(isolate, world));
   data->setInterfaceTemplate(world, &domTemplateKey, result);
   return result;
 }
 
+void V8TestInterfaceEventTargetConstructor::NamedConstructorAttributeGetter(
+    v8::Local<v8::Name> propertyName,
+    const v8::PropertyCallbackInfo<v8::Value>& info) {
+  v8::Local<v8::Context> creationContext = info.Holder()->CreationContext();
+  V8PerContextData* perContextData = V8PerContextData::from(creationContext);
+  if (!perContextData) {
+    // TODO(yukishiino): Return a valid named constructor even after the context is detached
+    return;
+  }
+
+  v8::Local<v8::Function> namedConstructor = perContextData->constructorForType(&V8TestInterfaceEventTargetConstructor::wrapperTypeInfo);
+
+  // Set the prototype of named constructors to the regular constructor.
+  auto privateProperty = V8PrivateProperty::getNamedConstructorInitialized(info.GetIsolate());
+  v8::Local<v8::Value> privateValue = privateProperty.get(creationContext, namedConstructor);
+  if (privateValue.IsEmpty()) {
+    v8::Local<v8::Function> interface = perContextData->constructorForType(&V8TestInterfaceEventTarget::wrapperTypeInfo);
+    v8::Local<v8::Value> interfacePrototype = interface->Get(creationContext, v8AtomicString(info.GetIsolate(), "prototype")).ToLocalChecked();
+    bool result = namedConstructor->Set(creationContext, v8AtomicString(info.GetIsolate(), "prototype"), interfacePrototype).ToChecked();
+    if (!result)
+      return;
+    privateProperty.set(creationContext, namedConstructor, v8::True(info.GetIsolate()));
+  }
+
+  v8SetReturnValue(info, namedConstructor);
+}
+
 static void installV8TestInterfaceEventTargetTemplate(v8::Isolate* isolate, const DOMWrapperWorld& world, v8::Local<v8::FunctionTemplate> interfaceTemplate) {
   // Initialize the interface object's template.
   V8DOMConfiguration::initializeDOMInterfaceTemplate(isolate, interfaceTemplate, V8TestInterfaceEventTarget::wrapperTypeInfo.interfaceName, V8EventTarget::domTemplate(isolate, world), V8TestInterfaceEventTarget::internalFieldCount);