Move ui/base/x/x11_error_tracker to base/x11.

base/x11/x11_error_tracker_gtk.cc

Index: base/x11/x11_error_tracker_gtk.cc
diff --git a/ui/base/x/x11_error_tracker_gtk.cc b/base/x11/x11_error_tracker_gtk.cc
similarity index 86%
rename from ui/base/x/x11_error_tracker_gtk.cc
rename to base/x11/x11_error_tracker_gtk.cc
index 2806d34b978eceebd88193fa0b60bb717299a038..1324d3c658c63ceece5516ab201271065c3dbcaa 100644
--- a/ui/base/x/x11_error_tracker_gtk.cc
+++ b/base/x11/x11_error_tracker_gtk.cc
@@ -2,13 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ui/base/x/x11_error_tracker.h"
+#include "base/x11/x11_error_tracker.h"
 
 #include <gdk/gdkx.h>
 
 #include "base/logging.h"
 
-namespace ui {
+namespace base {
 
 X11ErrorTracker::X11ErrorTracker() {
   gdk_error_trap_push();
@@ -26,4 +26,4 @@ bool X11ErrorTracker::FoundNewError() {
   return found_error;
 }
 
-}  // namespace ui
+}  // namespace base