Enabled pressing TAB to cycle through the Omnibox results.

chrome/browser/ui/views/location_bar/location_bar_view.cc

Index: chrome/browser/ui/views/location_bar/location_bar_view.cc
===================================================================
--- chrome/browser/ui/views/location_bar/location_bar_view.cc	(revision 80563)
+++ chrome/browser/ui/views/location_bar/location_bar_view.cc	(working copy)
@@ -989,24 +989,8 @@
     const views::KeyEvent& event) {
 #if defined(OS_WIN)
   if (views::FocusManager::IsTabTraversalKeyEvent(event)) {
-    if (HasValidSuggestText()) {
-      // Return true so that the edit sees the tab and commits the suggestion.
-      return true;
-    }
-    if (keyword_hint_view_->IsVisible() && !event.IsShiftDown()) {
-      // Return true so the edit gets the tab event and enters keyword mode.
-      return true;
-    }
-
-    // If the caret is not at the end, then tab moves the caret to the end.
-    if (!location_entry_->IsCaretAtEnd())
-      return true;
-
-    // Tab while showing instant commits instant immediately.
-    // Return true so that focus traversal isn't attempted. The edit ends
-    // up doing nothing in this case.
-    if (location_entry_->model()->AcceptCurrentInstantPreview())
-      return true;
+    return location_entry_->model()->popup_model()->IsOpen() ||
+      (keyword_hint_view_->IsVisible() && !event.IsShiftDown());
   }
 
   return location_entry_->SkipDefaultKeyEventProcessing(event);