Fix a bug where window.screen would return 0, 0 as the width and height

content/browser/renderer_host/render_widget_host_gtk.cc

Index: content/browser/renderer_host/render_widget_host_gtk.cc
diff --git a/content/browser/renderer_host/render_widget_host_gtk.cc b/content/browser/renderer_host/render_widget_host_gtk.cc
index b7dd333bf5be8830824abc14d83c9f8e9ba37ec7..7233ba06ed18f0b14ea5268e3b6171de3a5ff0e2 100644
--- a/content/browser/renderer_host/render_widget_host_gtk.cc
+++ b/content/browser/renderer_host/render_widget_host_gtk.cc
@@ -28,7 +28,7 @@ void RenderWidgetHost::OnMsgGetScreenInfo(gfx::NativeViewId view,
     gdk_window = widget->window;
   } else {
     GdkDisplay* display = gdk_display_get_default();
-    gdk_window = gdk_display_get_window_at_pointer(display, NULL, NULL);
+    gdk_window = gdk_display_get_default_group(display);
   }
   if (!gdk_window)
     return;