X message pump: Remove the GDK window event filter.

base/message_pump_glib_x.cc

Index: base/message_pump_glib_x.cc
diff --git a/base/message_pump_glib_x.cc b/base/message_pump_glib_x.cc
index c694114d2933b97253723f4921ff5919a2f56fd1..d45ce7e7c878efd50b9ed11499c2fb50014cf1e0 100644
--- a/base/message_pump_glib_x.cc
+++ b/base/message_pump_glib_x.cc
@@ -43,6 +43,11 @@ MessagePumpGlibX::MessagePumpGlibX() : base::MessagePumpForUI(),
 }
 
 MessagePumpGlibX::~MessagePumpGlibX() {
+  gdk_window_remove_filter(NULL, &GdkEventFilter, this);
+
+  // It is not necessary to reset the GDK event handler using
+  // gdk_event_handler_set since it's done in the destructor for
+  // MessagePumpForUI.
 }
 
 bool MessagePumpGlibX::ShouldCaptureXEvent(XEvent* xev) {