Add parallel recompilation time to histogram and plot execution pause times.

src/log-utils.cc

Index: src/log-utils.cc
diff --git a/src/log-utils.cc b/src/log-utils.cc
index 930b4baceb7531e3917d0dcff5d5027e28fa517c..7ae96dbde48f738645a2c508dd181a939051c2d8 100644
--- a/src/log-utils.cc
+++ b/src/log-utils.cc
@@ -80,7 +80,8 @@ void Log::Initialize() {
 
   bool open_log_file = FLAG_log || FLAG_log_runtime || FLAG_log_api
       || FLAG_log_code || FLAG_log_gc || FLAG_log_handles || FLAG_log_suspect
-      || FLAG_log_regexp || FLAG_log_state_changes || FLAG_ll_prof;
+      || FLAG_log_regexp || FLAG_log_state_changes || FLAG_ll_prof
+      || FLAG_log_timer_events;
 
   // If we're logging anything, we need to open the log file.
   if (open_log_file) {