Don't call AcceptCurrentInstantPreview() when the user hits Tab.

chrome/browser/ui/gtk/omnibox/omnibox_view_gtk.cc

Index: chrome/browser/ui/gtk/omnibox/omnibox_view_gtk.cc
diff --git a/chrome/browser/ui/gtk/omnibox/omnibox_view_gtk.cc b/chrome/browser/ui/gtk/omnibox/omnibox_view_gtk.cc
index a0b07a5d3340d858b89bdf04728e24eb1ffc5108..fb46332330f03d2f7975fe3bc1d14e5b175ccbe8 100644
--- a/chrome/browser/ui/gtk/omnibox/omnibox_view_gtk.cc
+++ b/chrome/browser/ui/gtk/omnibox/omnibox_view_gtk.cc
@@ -1540,9 +1540,6 @@ void OmniboxViewGtk::HandleViewMoveFocus(GtkWidget* widget,
   if (!handled && gtk_widget_get_visible(instant_view_))
     handled = model()->CommitSuggestedText(true);
 
-  if (!handled)
-    handled = model()->AcceptCurrentInstantPreview();
-
   if (handled) {
     static guint signal_id = g_signal_lookup("move-focus", GTK_TYPE_WIDGET);
     g_signal_stop_emission(widget, signal_id, 0);