bindings: Use CreateDataProperty() instead of ForceSet()

Source/bindings/core/v8/WindowProxy.cpp

Index: Source/bindings/core/v8/WindowProxy.cpp
diff --git a/Source/bindings/core/v8/WindowProxy.cpp b/Source/bindings/core/v8/WindowProxy.cpp
index 6374266650f27573d4734429b2c0bfacedfcb171..53b1d042999cd0fc2e1f1b51a79faba5df0de5ce 100644
--- a/Source/bindings/core/v8/WindowProxy.cpp
+++ b/Source/bindings/core/v8/WindowProxy.cpp
@@ -374,6 +374,8 @@ void WindowProxy::updateDocumentProperty()
     checkDocumentWrapper(m_document.newLocal(m_isolate), frame->document());
 
     ASSERT(documentWrapper->IsObject());
+    // TODO(bashi): Avoid using ForceSet(). When we use accessors to implement
+    // attributes, we may be able to remove updateDocumentProperty().
     if (!v8CallBoolean(context->Global()->ForceSet(context, v8AtomicString(m_isolate, "document"), documentWrapper, static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete))))
         return;