I think we can use 4 pointers for most of the classes that are unlikely to grow and 8 for WebKitWebView and WebKitWebContext.
Created attachment 193551 [details] Patch
Comment on attachment 193551 [details] Patch Sounds good to me
I had forgotten this patch. It's very important to land this before making the first unstable release. Please, owners, this should be trivial to review and has already been approved by Gustavo.
Committed r150130: <http://trac.webkit.org/changeset/150130>