Chromium's compile broke with: http://trac.webkit.org/changeset/52040 Due to the inclusion of <runtime/WeakGCMap.h>.
Created attachment 44724 [details] Ifdef out a JSC header from Document.h
Comment on attachment 44724 [details] Ifdef out a JSC header from Document.h r=me
Closed since 52040 was rolled back, hence this no longer applies.