Revert 34994, maybe it regressed startup perf - Fix cpu/memory measurements on OS X. Right now, this only works for the current process; support for child processes will be added in a later CL. BUG=13156, 25454 TEST=Hook up task manager (connect menu item to commandDispatch:, give it the right tag). Stats for the browser process should now be right, and %cpu should be 0 (for now) for all other processes. Review URL: http://codereview.chromium.org/500118 TBR=thakis@chromium.org Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=35025