[chromium] Chromium's DRT implementation should support DumpMalloc and DumpJSHeap Mac DRT dumps these for run-perf-tests, which are collected and reported in the results pages and tracked automatically at perf.webkit.org run-perf-test would magically start reporting them if we dumped either of these. DumpJSHeap: appears to be an exit-time thing. DumpMalloc is done as part of a normal dump(): WTF::FastMallocStatistics mallocStats = WTF::fastMallocStatistics(); printf("DumpMalloc: %li\n", mallocStats.committedVMBytes);