Since these files are now autogenerated, I think it would be nice if they appeared in the relevant project files as "Generated" sources that could be easily inspected from within Visual Studio.
The attached patch adds these two files, so they can be quickly checked to confirm proper generator function.
Created attachment 187962 [details]
Created attachment 204622 [details]
Committed r151557: <http://trac.webkit.org/changeset/151557>