About:build shows that PAGE_CACHE is not enabled, while we did enable page cache. Page cache is enabled as a run-time feature instead of build-time feature, there's no PAGE_CACHE macro to control the availability of page cache.
Created attachment 156582 [details] Patch
Comment on attachment 156582 [details] Patch Clearing flags on attachment: 156582 Committed r124838: <http://trac.webkit.org/changeset/124838>
All reviewed patches have been landed. Closing bug.