Revert 212948 "Made MessagePump a non-thread safe class."

trunk/src/base/message_loop/message_pump_gtk.cc

Index: trunk/src/base/message_loop/message_pump_gtk.cc
===================================================================
--- trunk/src/base/message_loop/message_pump_gtk.cc	(revision 212951)
+++ trunk/src/base/message_loop/message_pump_gtk.cc	(working copy)
@@ -65,11 +65,6 @@
   gdk_event_handler_set(&EventDispatcher, this, NULL);
 }
 
-MessagePumpGtk::~MessagePumpGtk() {
-  gdk_event_handler_set(reinterpret_cast<GdkEventFunc>(gtk_main_do_event),
-                        this, NULL);
-}
-
 void MessagePumpGtk::DispatchEvents(GdkEvent* event) {
   UNSHIPPED_TRACE_EVENT1("task", "MessagePumpGtk::DispatchEvents",
                          "type", EventToTypeString(event));
@@ -97,6 +92,11 @@
   return GDK_DISPLAY_XDISPLAY(display);
 }
 
+MessagePumpGtk::~MessagePumpGtk() {
+  gdk_event_handler_set(reinterpret_cast<GdkEventFunc>(gtk_main_do_event),
+                        this, NULL);
+}
+
 void MessagePumpGtk::WillProcessEvent(GdkEvent* event) {
   FOR_EACH_OBSERVER(MessagePumpObserver, observers(), WillProcessEvent(event));
 }