Add support for allowing an embedder to get the V8 profile timer event logs.

src/log.cc

Index: src/log.cc
diff --git a/src/log.cc b/src/log.cc
index 1c332d1736318fdccd8f8a313545019df7e6469a..76fef5cd280887e4f41f51f2a696f2b7eb56ce63 100644
--- a/src/log.cc
+++ b/src/log.cc
@@ -1124,8 +1124,14 @@ void Logger::LeaveExternal(Isolate* isolate) {
 }
 
 
+void Logger::LogInternalEvents(const char* name, int se) {
+  Isolate* isolate = Isolate::Current();
+  LOG(isolate, TimerEvent(static_cast<StartEnd>(se), name));
+}
+
+
 void Logger::TimerEventScope::LogTimerEvent(StartEnd se) {
-  LOG(isolate_, TimerEvent(se, name_));
+  isolate_->event_logger()(name_, se);
 }