Enabled pressing TAB to cycle through the Omnibox results.

chrome/browser/autocomplete/autocomplete_edit.h

Index: chrome/browser/autocomplete/autocomplete_edit.h
===================================================================
--- chrome/browser/autocomplete/autocomplete_edit.h	(revision 108642)
+++ chrome/browser/autocomplete/autocomplete_edit.h	(working copy)
@@ -123,6 +123,8 @@
 
   Profile* profile() const { return profile_; }
 
+  OmniboxView* view() const { return view_; }
+
   // Returns the current state.  This assumes we are switching tabs, and changes
   // the internal state appropriately.
   const State GetStateForTabSwitch();
@@ -379,6 +381,9 @@
   // Returns true if a keyword is selected.
   bool KeywordIsSelected() const;
 
+  // Turns off keyword mode for the current match.
+  void ClearPopupKeywordMode() const;
+
   // Conversion between user text and display text. User text is the text the
   // user has input. Display text is the text being shown in the edit. The
   // two are different if a keyword is selected.