We use the CodeBlock* field of RepatchBuffer in various places. Usually, when we use this field, we're doing it wrong, since we never really know which CodeBlock* the RepatchBuffer points to. Also, this field was there to support WX_EXCLUSIVE, which doesn't work anymore and probably never will (since nobody is working on it). Killing that feature means that we no longer have to be careful about caching a RepatchBuffer and passing it around.
Created attachment 260498 [details] the patch
Created attachment 260500 [details] more fixes
Comment on attachment 260500 [details] more fixes r=me
Landed in http://trac.webkit.org/changeset/189278