Enabled pressing TAB to cycle through the Omnibox results.

chrome/browser/ui/views/omnibox/omnibox_view_views.cc

Index: chrome/browser/ui/views/omnibox/omnibox_view_views.cc
===================================================================
--- chrome/browser/ui/views/omnibox/omnibox_view_views.cc	(revision 93757)
+++ chrome/browser/ui/views/omnibox/omnibox_view_views.cc	(working copy)
@@ -215,8 +215,11 @@
              event.key_code() == ui::VKEY_TAB &&
              !event.IsShiftDown() &&
              !event.IsControlDown()) {
-    if (model_->is_keyword_hint()) {
+    if (model_->is_keyword_hint() && !event.IsShiftDown()) {
       handled = model_->AcceptKeyword();
+    } else if (model_->popup_model()->IsOpen()) {
+      model_->OnUpOrDownKeyPressed(event.IsShiftDown() ? -1 : 1);
+      handled = true;
     } else {
       string16::size_type start = 0;
       string16::size_type end = 0;