GTK: Port to gdk_x11_window_lookup_for_display

ui/base/x/active_window_watcher_x.cc

Index: ui/base/x/active_window_watcher_x.cc
diff --git a/ui/base/x/active_window_watcher_x.cc b/ui/base/x/active_window_watcher_x.cc
index 01c4a88ccc786c611229532659ba660fc34a49a7..7b0fefd1f610b466560f0fb144ba05af3ab8a245 100644
--- a/ui/base/x/active_window_watcher_x.cc
+++ b/ui/base/x/active_window_watcher_x.cc
@@ -5,6 +5,7 @@
 #include <X11/Xlib.h>
 #include <gdk/gdk.h>
 #include <gdk/gdkx.h>
+#include "ui/base/gtk/gtk_compat.h"
 
 #include "ui/base/x/active_window_watcher_x.h"
 
@@ -87,7 +88,8 @@ void ActiveWindowWatcherX::NotifyActiveWindowChanged() {
   // reason.)
   if (format == 32 && num_items == 1) {
     int xid = *reinterpret_cast<int*>(property);
-    GdkWindow* active_window = gdk_window_lookup(xid);
+    GdkDisplay *display = gdk_display_get_default();
+    GdkWindow* active_window = gdk_x11_window_lookup_for_display(display, xid);
     FOR_EACH_OBSERVER(
         Observer,
         observers_,