Make sure that the UI window created by base::MessagePumpForUI is destoyed on the same thread (Wind…

base/message_pump_libevent.cc

Index: base/message_pump_libevent.cc
diff --git a/base/message_pump_libevent.cc b/base/message_pump_libevent.cc
index 364f44a5f70eb2119d36174afb3023ae08cf733e..754f322c4fc0d993cc15d7603f99cd956389c1e4 100644
--- a/base/message_pump_libevent.cc
+++ b/base/message_pump_libevent.cc
@@ -305,6 +305,9 @@ void MessagePumpLibevent::ScheduleDelayedWork(
   delayed_work_time_ = delayed_work_time;
 }
 
+void MessagePumpLibevent::Shutdown() {
+}
+
 void MessagePumpLibevent::WillProcessIOEvent() {
   FOR_EACH_OBSERVER(IOObserver, io_observers_, WillProcessIOEvent());
 }