| Index: Source/bindings/tests/results/core/V8TestObject.cpp | 
| diff --git a/Source/bindings/tests/results/core/V8TestObject.cpp b/Source/bindings/tests/results/core/V8TestObject.cpp | 
| index 54802e1814ed1ed7d916e9c377204266cd6e8daa..a2262d86ba4d2bdcfd8065c61d798430c5281314 100644 | 
| --- a/Source/bindings/tests/results/core/V8TestObject.cpp | 
| +++ b/Source/bindings/tests/results/core/V8TestObject.cpp | 
| @@ -9489,7 +9489,9 @@ static void itemMethod(const v8::FunctionCallbackInfo<v8::Value>& info) | 
| if (exceptionState.throwIfNeeded()) | 
| return; | 
| } | 
| -    v8SetReturnValue(info, impl->item(index).v8Value()); | 
| +    ScriptState* scriptState = ScriptState::current(info.GetIsolate()); | 
| +    ScriptValue result = impl->item(scriptState, index); | 
| +    v8SetReturnValue(info, result.v8Value()); | 
| } | 
|  | 
| static void itemMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info) | 
| @@ -9499,6 +9501,37 @@ static void itemMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info) | 
| TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution"); | 
| } | 
|  | 
| +static void setItemMethod(const v8::FunctionCallbackInfo<v8::Value>& info) | 
| +{ | 
| +    ExceptionState exceptionState(ExceptionState::ExecutionContext, "setItem", "TestObject", info.Holder(), info.GetIsolate()); | 
| +    if (UNLIKELY(info.Length() < 2)) { | 
| +        setMinimumArityTypeError(exceptionState, 2, info.Length()); | 
| +        exceptionState.throwIfNeeded(); | 
| +        return; | 
| +    } | 
| +    TestObject* impl = V8TestObject::toImpl(info.Holder()); | 
| +    unsigned index; | 
| +    V8StringResource<> value; | 
| +    { | 
| +        index = toUInt32(info[0], exceptionState); | 
| +        if (exceptionState.throwIfNeeded()) | 
| +            return; | 
| +        value = info[1]; | 
| +        if (!value.prepare()) | 
| +            return; | 
| +    } | 
| +    ScriptState* scriptState = ScriptState::current(info.GetIsolate()); | 
| +    String result = impl->setItem(scriptState, index, value); | 
| +    v8SetReturnValueString(info, result, info.GetIsolate()); | 
| +} | 
| + | 
| +static void setItemMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info) | 
| +{ | 
| +    TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod"); | 
| +    TestObjectV8Internal::setItemMethod(info); | 
| +    TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution"); | 
| +} | 
| + | 
| static void voidMethodClampUnsignedShortArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info) | 
| { | 
| ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodClampUnsignedShortArg", "TestObject", info.Holder(), info.GetIsolate()); | 
| @@ -11707,7 +11740,8 @@ static void iteratorMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& in | 
| static void indexedPropertyGetter(uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info) | 
| { | 
| TestObject* impl = V8TestObject::toImpl(info.Holder()); | 
| -    ScriptValue result = impl->item(index); | 
| +    ScriptState* scriptState = ScriptState::current(info.GetIsolate()); | 
| +    ScriptValue result = impl->item(scriptState, index); | 
| if (result.isEmpty()) | 
| return; | 
| v8SetReturnValue(info, result.v8Value()); | 
| @@ -11720,6 +11754,45 @@ static void indexedPropertyGetterCallback(uint32_t index, const v8::PropertyCall | 
| TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution"); | 
| } | 
|  | 
| +static void indexedPropertySetter(uint32_t index, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<v8::Value>& info) | 
| +{ | 
| +    TestObject* impl = V8TestObject::toImpl(info.Holder()); | 
| +    V8StringResource<> propertyValue = v8Value; | 
| +    if (!propertyValue.prepare()) | 
| +        return; | 
| +    ScriptState* scriptState = ScriptState::current(info.GetIsolate()); | 
| +    bool result = impl->setItem(scriptState, index, propertyValue); | 
| +    if (!result) | 
| +        return; | 
| +    v8SetReturnValue(info, v8Value); | 
| +} | 
| + | 
| +static void indexedPropertySetterCallback(uint32_t index, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<v8::Value>& info) | 
| +{ | 
| +    TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMIndexedProperty"); | 
| +    TestObjectV8Internal::indexedPropertySetter(index, v8Value, info); | 
| +    TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution"); | 
| +} | 
| + | 
| +static void indexedPropertyDeleter(uint32_t index, const v8::PropertyCallbackInfo<v8::Boolean>& info) | 
| +{ | 
| +    TestObject* impl = V8TestObject::toImpl(info.Holder()); | 
| +    ExceptionState exceptionState(ExceptionState::IndexedDeletionContext, "TestObject", info.Holder(), info.GetIsolate()); | 
| +    ScriptState* scriptState = ScriptState::current(info.GetIsolate()); | 
| +    DeleteResult result = impl->anonymousIndexedDeleter(scriptState, index, exceptionState); | 
| +    if (exceptionState.throwIfNeeded()) | 
| +        return; | 
| +    if (result != DeleteUnknownProperty) | 
| +        return v8SetReturnValueBool(info, result == DeleteSuccess); | 
| +} | 
| + | 
| +static void indexedPropertyDeleterCallback(uint32_t index, const v8::PropertyCallbackInfo<v8::Boolean>& info) | 
| +{ | 
| +    TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMIndexedProperty"); | 
| +    TestObjectV8Internal::indexedPropertyDeleter(index, info); | 
| +    TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution"); | 
| +} | 
| + | 
| static void namedPropertyGetter(v8::Local<v8::Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) | 
| { | 
| if (!name->IsString()) | 
| @@ -11732,7 +11805,8 @@ static void namedPropertyGetter(v8::Local<v8::Name> name, const v8::PropertyCall | 
|  | 
| TestObject* impl = V8TestObject::toImpl(info.Holder()); | 
| AtomicString propertyName = toCoreAtomicString(nameString); | 
| -    ScriptValue result = impl->anonymousNamedGetter(propertyName); | 
| +    ScriptState* scriptState = ScriptState::current(info.GetIsolate()); | 
| +    ScriptValue result = impl->anonymousNamedGetter(scriptState, propertyName); | 
| if (result.isEmpty()) | 
| return; | 
| v8SetReturnValue(info, result.v8Value()); | 
| @@ -11745,6 +11819,37 @@ static void namedPropertyGetterCallback(v8::Local<v8::Name> name, const v8::Prop | 
| TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution"); | 
| } | 
|  | 
| +static void namedPropertySetter(v8::Local<v8::Name> name, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<v8::Value>& info) | 
| +{ | 
| +    if (!name->IsString()) | 
| +        return; | 
| +    auto nameString = name.As<v8::String>(); | 
| +    if (info.Holder()->HasRealNamedProperty(nameString)) | 
| +        return; | 
| +    if (!info.Holder()->GetRealNamedPropertyInPrototypeChain(nameString).IsEmpty()) | 
| +        return; | 
| + | 
| +    TestObject* impl = V8TestObject::toImpl(info.Holder()); | 
| +    V8StringResource<> propertyName(nameString); | 
| +    if (!propertyName.prepare()) | 
| +        return; | 
| +    V8StringResource<> propertyValue = v8Value; | 
| +    if (!propertyValue.prepare()) | 
| +        return; | 
| +    ScriptState* scriptState = ScriptState::current(info.GetIsolate()); | 
| +    bool result = impl->anonymousNamedSetter(scriptState, propertyName, propertyValue); | 
| +    if (!result) | 
| +        return; | 
| +    v8SetReturnValue(info, v8Value); | 
| +} | 
| + | 
| +static void namedPropertySetterCallback(v8::Local<v8::Name> name, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<v8::Value>& info) | 
| +{ | 
| +    TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMNamedProperty"); | 
| +    TestObjectV8Internal::namedPropertySetter(name, v8Value, info); | 
| +    TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution"); | 
| +} | 
| + | 
| static void namedPropertyQuery(v8::Local<v8::Name> name, const v8::PropertyCallbackInfo<v8::Integer>& info) | 
| { | 
| if (!name->IsString()) | 
| @@ -11768,6 +11873,25 @@ static void namedPropertyQueryCallback(v8::Local<v8::Name> name, const v8::Prope | 
| TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution"); | 
| } | 
|  | 
| +static void namedPropertyDeleter(v8::Local<v8::Name> name, const v8::PropertyCallbackInfo<v8::Boolean>& info) | 
| +{ | 
| +    if (!name->IsString()) | 
| +        return; | 
| +    TestObject* impl = V8TestObject::toImpl(info.Holder()); | 
| +    AtomicString propertyName = toCoreAtomicString(name.As<v8::String>()); | 
| +    ScriptState* scriptState = ScriptState::current(info.GetIsolate()); | 
| +    DeleteResult result = impl->anonymousNamedDeleter(scriptState, propertyName); | 
| +    if (result != DeleteUnknownProperty) | 
| +        return v8SetReturnValueBool(info, result == DeleteSuccess); | 
| +} | 
| + | 
| +static void namedPropertyDeleterCallback(v8::Local<v8::Name> name, const v8::PropertyCallbackInfo<v8::Boolean>& info) | 
| +{ | 
| +    TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMNamedProperty"); | 
| +    TestObjectV8Internal::namedPropertyDeleter(name, info); | 
| +    TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution"); | 
| +} | 
| + | 
| static void namedPropertyEnumerator(const v8::PropertyCallbackInfo<v8::Array>& info) | 
| { | 
| TestObject* impl = V8TestObject::toImpl(info.Holder()); | 
| @@ -12118,6 +12242,7 @@ static const V8DOMConfiguration::MethodConfiguration V8TestObjectMethods[] = { | 
| {"promiseOverloadMethod", TestObjectV8Internal::promiseOverloadMethodMethodCallback, 0, 0, V8DOMConfiguration::ExposedToAllScripts}, | 
| {"overloadedPerWorldBindingsMethod", TestObjectV8Internal::overloadedPerWorldBindingsMethodMethodCallback, TestObjectV8Internal::overloadedPerWorldBindingsMethodMethodCallbackForMainWorld, 0, V8DOMConfiguration::ExposedToAllScripts}, | 
| {"item", TestObjectV8Internal::itemMethodCallback, 0, 1, V8DOMConfiguration::ExposedToAllScripts}, | 
| +    {"setItem", TestObjectV8Internal::setItemMethodCallback, 0, 2, V8DOMConfiguration::ExposedToAllScripts}, | 
| {"voidMethodClampUnsignedShortArg", TestObjectV8Internal::voidMethodClampUnsignedShortArgMethodCallback, 0, 1, V8DOMConfiguration::ExposedToAllScripts}, | 
| {"voidMethodClampUnsignedLongArg", TestObjectV8Internal::voidMethodClampUnsignedLongArgMethodCallback, 0, 1, V8DOMConfiguration::ExposedToAllScripts}, | 
| {"voidMethodDefaultUndefinedTestInterfaceEmptyArg", TestObjectV8Internal::voidMethodDefaultUndefinedTestInterfaceEmptyArgMethodCallback, 0, 0, V8DOMConfiguration::ExposedToAllScripts}, | 
| @@ -12278,11 +12403,11 @@ static void installV8TestObjectTemplate(v8::Local<v8::FunctionTemplate> function | 
| static_assert(1 == TestObject::FEATURE_ENABLED_CONST, "the value of TestObject_FEATURE_ENABLED_CONST does not match with implementation"); | 
| static_assert(1 == TestObject::CONST_IMPL, "the value of TestObject_CONST_IMPL does not match with implementation"); | 
| { | 
| -        v8::IndexedPropertyHandlerConfiguration config(TestObjectV8Internal::indexedPropertyGetterCallback, 0, 0, 0, indexedPropertyEnumerator<TestObject>); | 
| +        v8::IndexedPropertyHandlerConfiguration config(TestObjectV8Internal::indexedPropertyGetterCallback, TestObjectV8Internal::indexedPropertySetterCallback, 0, TestObjectV8Internal::indexedPropertyDeleterCallback, indexedPropertyEnumerator<TestObject>); | 
| functionTemplate->InstanceTemplate()->SetHandler(config); | 
| } | 
| { | 
| -        v8::NamedPropertyHandlerConfiguration config(TestObjectV8Internal::namedPropertyGetterCallback, 0, TestObjectV8Internal::namedPropertyQueryCallback, 0, TestObjectV8Internal::namedPropertyEnumeratorCallback); | 
| +        v8::NamedPropertyHandlerConfiguration config(TestObjectV8Internal::namedPropertyGetterCallback, TestObjectV8Internal::namedPropertySetterCallback, TestObjectV8Internal::namedPropertyQueryCallback, TestObjectV8Internal::namedPropertyDeleterCallback, TestObjectV8Internal::namedPropertyEnumeratorCallback); | 
| functionTemplate->InstanceTemplate()->SetHandler(config); | 
| } | 
| static const V8DOMConfiguration::SymbolKeyedMethodConfiguration symbolKeyedIteratorConfiguration = { v8::Symbol::GetIterator, TestObjectV8Internal::iteratorMethodCallback, 0, V8DOMConfiguration::ExposedToAllScripts }; | 
|  |