Move ui::GetAtom to gfx::GetAtom

ui/base/idle/screensaver_window_finder_x11.cc

Index: ui/base/idle/screensaver_window_finder_x11.cc
diff --git a/ui/base/idle/screensaver_window_finder_x11.cc b/ui/base/idle/screensaver_window_finder_x11.cc
index 74228ba41a4442c31e593cbcf9819a4c1f8d2431..e01cd247d39250d85919874c1baf095e080af166 100644
--- a/ui/base/idle/screensaver_window_finder_x11.cc
+++ b/ui/base/idle/screensaver_window_finder_x11.cc
@@ -7,6 +7,7 @@
 #include <X11/extensions/scrnsaver.h>
 
 #include "ui/base/x/x11_util.h"
+#include "ui/gfx/x/x11_atom_cache.h"
 #include "ui/gfx/x/x11_error_tracker.h"
 
 namespace ui {
@@ -32,7 +33,7 @@ bool ScreensaverWindowFinder::ScreensaverWindowExists() {
   // info.state == ScreenSaverOff or info.state == ScreenSaverDisabled does not
   // necessarily mean that a screensaver is not active, so add a special check
   // for xscreensaver.
-  static XAtom lock_atom = GetAtom("LOCK");
+  XAtom lock_atom = gfx::GetAtom("LOCK");
   std::vector<int> atom_properties;
   if (GetIntArrayProperty(root, "_SCREENSAVER_STATUS", &atom_properties) &&
       atom_properties.size() > 0) {