Log deopts with --log-timer-events.

src/log.cc

Index: src/log.cc
diff --git a/src/log.cc b/src/log.cc
index 82ce886fc9248cd31f49bca7e691b071bad4ff6c..128d3f8e948abd685a279e1b28d09660a3a6f5b0 100644
--- a/src/log.cc
+++ b/src/log.cc
@@ -637,6 +637,16 @@ void Logger::SharedLibraryEvent(const wchar_t* library_path,
 }
 
 
+void Logger::CodeDeoptEvent(Code* code) {
+  if (!log_->IsEnabled()) return;
+  ASSERT(FLAG_log_internal_timer_events);
+  LogMessageBuilder msg(this);
+  int since_epoch = static_cast<int>(OS::Ticks() - epoch_);
+  msg.Append("code-deopt,%ld,%d\n", since_epoch, code->CodeSize());
+  msg.WriteToLogFile();
+}
+
+
 void Logger::TimerEvent(StartEnd se, const char* name) {
   if (!log_->IsEnabled()) return;
   ASSERT(FLAG_log_internal_timer_events);