Made MessagePump a non-thread safe class.

base/message_loop/message_pump_glib.cc

Index: base/message_loop/message_pump_glib.cc
diff --git a/base/message_loop/message_pump_glib.cc b/base/message_loop/message_pump_glib.cc
index de012fdddea5bfd7e517b8b037502d6e7df26e46..cfacb7b09a05eeca0eab6df74eb346869faf8edc 100644
--- a/base/message_loop/message_pump_glib.cc
+++ b/base/message_loop/message_pump_glib.cc
@@ -160,6 +160,13 @@ MessagePumpGlib::MessagePumpGlib()
   g_source_attach(work_source_, context_);
 }
 
+MessagePumpGlib::~MessagePumpGlib() {
+  g_source_destroy(work_source_);
+  g_source_unref(work_source_);
+  close(wakeup_pipe_read_);
+  close(wakeup_pipe_write_);
+}
+
 void MessagePumpGlib::RunWithDispatcher(Delegate* delegate,
                                         MessagePumpDispatcher* dispatcher) {
 #ifndef NDEBUG
@@ -320,13 +327,6 @@ void MessagePumpGlib::ScheduleDelayedWork(const TimeTicks& delayed_work_time) {
   ScheduleWork();
 }
 
-MessagePumpGlib::~MessagePumpGlib() {
-  g_source_destroy(work_source_);
-  g_source_unref(work_source_);
-  close(wakeup_pipe_read_);
-  close(wakeup_pipe_write_);
-}
-
 MessagePumpDispatcher* MessagePumpGlib::GetDispatcher() {
   return state_ ? state_->dispatcher : NULL;
 }