Simply pass the API call through to the platform layer. Covered by existing tests.
Created attachment 179879 [details] Patch
There are also some minor changes in the patch to satisfy the style checker.
Comment on attachment 179879 [details] Patch Clearing flags on attachment: 179879 Committed r138006: <http://trac.webkit.org/changeset/138006>
All reviewed patches have been landed. Closing bug.