We can view native heap graph using the same UI as we employ for JS heap snapshots. Assuming the memory instrumentation provides enough named entries it may be quite useful for analyzing WebKit native memory.
Created attachment 183786 [details] Patch
Created attachment 183787 [details] Patch
Created attachment 183788 [details] Patch
Comment on attachment 183788 [details] Patch lgtm
Comment on attachment 183788 [details] Patch Clearing flags on attachment: 183788 Committed r140390: <http://trac.webkit.org/changeset/140390>
All reviewed patches have been landed. Closing bug.