Enabled pressing TAB to cycle through the Omnibox results.

chrome/browser/autocomplete/autocomplete_edit.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "base/string16.h"
@@ skipping 362 matching lines @@
   // AutocompleteController but resides here for now.  This method is used by
   // AutomationProvider::AutocompleteEditIsQueryInProgress.
   bool query_in_progress() const;
 
   // Called whenever user_text_ should change.
   void InternalSetUserText(const string16& text);
 
   // 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.
   string16 DisplayTextFromUserText(const string16& text) const;
   string16 UserTextFromDisplayText(const string16& text) const;
 
   // Copies the selected match into |match|.  If an update is in progress,
   // "selected" means "default in the latest matches".  If there are no matches,
   // does not update |match|.
   //
@@ skipping 158 matching lines @@
   // It has no effect if a keyword is already selected.
   bool allow_exact_keyword_match_;
 
   // Last value of InstantCompleteBehavior supplied to |SetSuggestedText|.
   InstantCompleteBehavior instant_complete_behavior_;
 
   DISALLOW_COPY_AND_ASSIGN(AutocompleteEditModel);
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_H_