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 7bd7baa2d83893642cc31ca95db5668422fac63d..7a6318888d132987cc037974f133cf7f0a7ebc96 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) {