binding: Returns null if there is no valid event handler.

third_party/WebKit/Source/bindings/tests/results/core/V8TestObject.cpp

Index: third_party/WebKit/Source/bindings/tests/results/core/V8TestObject.cpp
diff --git a/third_party/WebKit/Source/bindings/tests/results/core/V8TestObject.cpp b/third_party/WebKit/Source/bindings/tests/results/core/V8TestObject.cpp
index cf7eb778cb0787f1b5f70a5d135794f70c4edd43..569e20645146966229d95f99e828adede6e89e57 100644
--- a/third_party/WebKit/Source/bindings/tests/results/core/V8TestObject.cpp
+++ b/third_party/WebKit/Source/bindings/tests/results/core/V8TestObject.cpp
@@ -1806,7 +1806,7 @@ static void eventHandlerAttributeAttributeGetter(const v8::FunctionCallbackInfo<
     v8::Local<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     EventListener* cppValue(WTF::getPtr(impl->eventHandlerAttribute()));
-    v8SetReturnValue(info, cppValue ? v8::Local<v8::Value>(V8AbstractEventListener::cast(cppValue)->getListenerObject(impl->getExecutionContext())) : v8::Local<v8::Value>(v8::Null(info.GetIsolate())));
+    v8SetReturnValue(info, cppValue ? V8AbstractEventListener::cast(cppValue)->getListenerOrNull(info.GetIsolate(), impl->getExecutionContext()) : v8::Null(info.GetIsolate()).As<v8::Value>());
 }
 
 static void eventHandlerAttributeAttributeGetterCallback(const v8::FunctionCallbackInfo<v8::Value>& info)