After we landed the chromium changes, those legacy members defined in WebDraggableRegion is not longer needed.
Created attachment 169212 [details]
Please wait for approval from email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org or email@example.com before submitting, as this patch contains changes to the Chromium public API. See also https://trac.webkit.org/wiki/ChromiumWebKitAPI.
Committed as http://trac.webkit.org/changeset/131621.