Linux perf integration with the new support for JIT.

src/log-utils.h

Index: src/log-utils.h
diff --git a/src/log-utils.h b/src/log-utils.h
index 7621668552d197b8126381feec99ca7ec42c89fe..3e70a96c8f1b97ac01cd57085a06a884b32e768e 100644
--- a/src/log-utils.h
+++ b/src/log-utils.h
@@ -30,7 +30,7 @@ class Log {
   static bool InitLogAtStart() {
     return FLAG_log || FLAG_log_api || FLAG_log_code || FLAG_log_gc ||
            FLAG_log_handles || FLAG_log_suspect || FLAG_log_regexp ||
-           FLAG_ll_prof || FLAG_perf_basic_prof ||
+           FLAG_ll_prof || FLAG_perf_basic_prof || FLAG_perf_prof ||
            FLAG_log_internal_timer_events || FLAG_prof_cpp;
   }