Fix V8 bindings for named constructors to set prototype object correctly

third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceNamedConstructor.cpp

Index: third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceNamedConstructor.cpp
diff --git a/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceNamedConstructor.cpp b/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceNamedConstructor.cpp
index 7571653d05004e08cc8b04ee041354308a000889..9b7c79b44a920625a25922e07a74a70556fc6aa5 100644
--- a/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceNamedConstructor.cpp
+++ b/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceNamedConstructor.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"
@@ -62,7 +63,7 @@ namespace TestInterfaceNamedConstructorV8Internal {
 #pragma clang diagnostic ignored "-Wglobal-constructors"
 #endif
 const V8DOMConfiguration::AttributeConfiguration V8TestInterfaceNamedConstructorLazyDataAttributes[] = {
-    {"testNamedConstructorConstructorAttribute", v8ConstructorAttributeGetter, 0, 0, 0, nullptr, const_cast<WrapperTypeInfo*>(&V8TestNamedConstructor::wrapperTypeInfo), static_cast<v8::PropertyAttribute>(v8::DontEnum), V8DOMConfiguration::OnInstance, V8DOMConfiguration::CheckHolder},
+    {"testNamedConstructorConstructorAttribute", V8TestNamedConstructor::NamedConstructorAttributeGetter, 0, 0, 0, nullptr, 0, static_cast<v8::PropertyAttribute>(v8::DontEnum), V8DOMConfiguration::OnInstance, V8DOMConfiguration::CheckHolder},
 };
 #if defined(COMPONENT_BUILD) && defined(WIN32) && COMPILER(CLANG)
 #pragma clang diagnostic pop
@@ -167,12 +168,47 @@ v8::Local<v8::FunctionTemplate> V8TestInterfaceNamedConstructorConstructor::domT
   result = v8::FunctionTemplate::New(isolate, V8TestInterfaceNamedConstructorConstructorCallback);
   v8::Local<v8::ObjectTemplate> instanceTemplate = result->InstanceTemplate();
   instanceTemplate->SetInternalFieldCount(V8TestInterfaceNamedConstructor::internalFieldCount);
-  result->SetClassName(v8AtomicString(isolate, "TestInterfaceNamedConstructor"));
+  result->SetClassName(v8AtomicString(isolate, "Audio"));
   result->Inherit(V8TestInterfaceNamedConstructor::domTemplate(isolate, world));
   data->setInterfaceTemplate(world, &domTemplateKey, result);
   return result;
 }
 
+void V8TestInterfaceNamedConstructorConstructor::NamedConstructorAttributeGetter(
+    v8::Local<v8::Name> propertyName,
+    const v8::PropertyCallbackInfo<v8::Value>& info) {
+  v8::Local<v8::Context> currentContext = info.Holder()->CreationContext();
+  V8PerContextData* perContextData = V8PerContextData::from(currentContext);
+  if (!perContextData)
+    return;
+
+  v8::Local<v8::Function> namedConstructor = perContextData->constructorForType(&V8TestInterfaceNamedConstructorConstructor::wrapperTypeInfo);
+
+  // Set the prototype of named constructors to the regular constructor.
+  auto privateProperty = V8PrivateProperty::getNamedConstructorInitialized(info.GetIsolate());
+  v8::Local<v8::Value> privateValue = privateProperty.get(currentContext, namedConstructor);
+  if (privateValue.IsEmpty()) {
+    v8::Local<v8::Function> interface = perContextData->constructorForType(&V8TestInterfaceNamedConstructor::wrapperTypeInfo);
+    // Only Window exposes named constructors, so that will always be the interface name.
+    ExceptionState exceptionState(info.GetIsolate(), ExceptionState::GetterContext, "Window", "Audio");
+    v8::MaybeLocal<v8::Value> interfacePrototype = interface->Get(currentContext, v8AtomicString(info.GetIsolate(), "prototype"));
+    if (interfacePrototype.IsEmpty()) {
+      exceptionState.throwTypeError("Could not get prototype for V8TestInterfaceNamedConstructor.");
+      return;
+    }
+
+    v8::Maybe<bool> setResult = namedConstructor->Set(currentContext, v8AtomicString(info.GetIsolate(), "prototype"), interfacePrototype.ToLocalChecked());
+    if (setResult.IsNothing() || setResult.ToChecked() != true) {
+      exceptionState.throwTypeError("Could not set prototype for Audio.");
+      return;
+    }
+
+    privateProperty.set(currentContext, namedConstructor, v8::True(info.GetIsolate()));
+  }
+
+  v8SetReturnValue(info, namedConstructor);
+}
+
 static void installV8TestInterfaceNamedConstructorTemplate(v8::Isolate* isolate, const DOMWrapperWorld& world, v8::Local<v8::FunctionTemplate> interfaceTemplate) {
   // Initialize the interface object's template.
   V8DOMConfiguration::initializeDOMInterfaceTemplate(isolate, interfaceTemplate, V8TestInterfaceNamedConstructor::wrapperTypeInfo.interfaceName, v8::Local<v8::FunctionTemplate>(), V8TestInterfaceNamedConstructor::internalFieldCount);