Make Dictionary::toV8Impl return v8::Undefined()

third_party/WebKit/Source/bindings/templates/dictionary_v8.cpp

Index: third_party/WebKit/Source/bindings/templates/dictionary_v8.cpp
diff --git a/third_party/WebKit/Source/bindings/templates/dictionary_v8.cpp b/third_party/WebKit/Source/bindings/templates/dictionary_v8.cpp
index 8c67c67bc50a1b07922ce3f53fc376364b32f431..582143235bf88728b212248b0e8797df57bb6a9a 100644
--- a/third_party/WebKit/Source/bindings/templates/dictionary_v8.cpp
+++ b/third_party/WebKit/Source/bindings/templates/dictionary_v8.cpp
@@ -94,7 +94,7 @@ v8::Local<v8::Value> {{cpp_class}}::toV8Impl(v8::Local<v8::Object> creationConte
 {
     v8::Local<v8::Object> v8Object = v8::Object::New(isolate);
     if (!toV8{{cpp_class}}(*this, v8Object, creationContext, isolate))
-        return v8::Local<v8::Value>();
+        return v8::Undefined(isolate);
     return v8Object;
 }