Resolve race between starting the profiler thread and the logging timer

BUG=none
TBR=ishell@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/638943002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24470 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/log.cc

@@ -1866,14 +1866,14 @@ bool Logger::SetUp(Isolate* isolate) {
     is_logging_ = true;
   }
 
+  if (FLAG_log_internal_timer_events || FLAG_prof) timer_.Start();
+
   if (FLAG_prof) {
     profiler_ = new Profiler(isolate);
     is_logging_ = true;
     profiler_->Engage();
   }
 
-  if (FLAG_log_internal_timer_events || FLAG_prof) timer_.Start();
-
   return true;
 }