We now use NativeHeapSnapshot.js which shares most of its implementation with JSHeapSnapshot.js
Created attachment 185499 [details] Patch
Comment on attachment 185499 [details] Patch lgtm
Comment on attachment 185499 [details] Patch Clearing flags on attachment: 185499 Committed r141272: <http://trac.webkit.org/changeset/141272>
All reviewed patches have been landed. Closing bug.