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

trunk/src/base/message_loop/message_pump_aurax11.cc

Index: trunk/src/base/message_loop/message_pump_aurax11.cc
===================================================================
--- trunk/src/base/message_loop/message_pump_aurax11.cc	(revision 212951)
+++ trunk/src/base/message_loop/message_pump_aurax11.cc	(working copy)
@@ -139,13 +139,6 @@
   x_root_window_ = DefaultRootWindow(g_xdisplay);
 }
 
-MessagePumpAuraX11::~MessagePumpAuraX11() {
-  g_source_destroy(x_source_);
-  g_source_unref(x_source_);
-  XCloseDisplay(g_xdisplay);
-  g_xdisplay = NULL;
-}
-
 // static
 Display* MessagePumpAuraX11::GetDefaultXDisplay() {
   if (!g_xdisplay)
@@ -218,6 +211,13 @@
   } while (event.type != MapNotify);
 }
 
+MessagePumpAuraX11::~MessagePumpAuraX11() {
+  g_source_destroy(x_source_);
+  g_source_unref(x_source_);
+  XCloseDisplay(g_xdisplay);
+  g_xdisplay = NULL;
+}
+
 void MessagePumpAuraX11::InitXSource() {
   // CHECKs are to help track down crbug.com/113106.
   CHECK(!x_source_);