Enabled pressing TAB to cycle through the Omnibox results.

chrome/browser/autocomplete/keyword_provider.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.
 //
 // This file contains the keyword autocomplete provider. The keyword provider
 // is responsible for remembering/suggesting user "search keyword queries"
 // (e.g.  "imdb Godzilla") and then fixing them up into valid URLs.  An
 // instance of it gets created and managed by the autocomplete controller.
 // KeywordProvider uses a TemplateURLService to find the set of keywords.
 //
@@ skipping 53 matching lines @@
       const string16& input,
       bool trim_leading_whitespace);
 
   // Returns the matching substituting keyword for |input|, or NULL if there
   // is no keyword for the specified input.
   static const TemplateURL* GetSubstitutingTemplateURLForInput(
       Profile* profile,
       const AutocompleteInput& input,
       string16* remaining_input);
 
+  // If |text| corresponds (in the sense of
+  // TemplateURLModel::CleanUserInputKeyword()) to an enabled, substituting
+  // keyword, returns that keyword; returns the empty string otherwise.
+  string16 GetKeywordForText(const string16& text) const;
+
+  // Creates a fully marked-up AutocompleteMatch for a specific keyword.
+  AutocompleteMatch CreateAutocompleteMatch(
+      const string16& keyword,
+      const AutocompleteInput& input);
+
   // AutocompleteProvider
   virtual void Start(const AutocompleteInput& input, bool minimal_changes);
   virtual void Stop();
 
  private:
   class ScopedEndExtensionKeywordMode;
   friend class ScopedEndExtensionKeywordMode;
 
   virtual ~KeywordProvider();
 
@@ skipping 46 matching lines @@
       int relevance);
 
   void EnterExtensionKeywordMode(const std::string& extension_id);
   void MaybeEndExtensionKeywordMode();
 
   // NotificationObserver interface.
   virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
+  TemplateURLService* GetTemplateURLService() const;
+
   // Model for the keywords.  This is only non-null when testing, otherwise the
   // TemplateURLService from the Profile is used.
   TemplateURLService* model_;
 
   // Identifies the current input state. This is incremented each time the
   // autocomplete edit's input changes in any way. It is used to tell whether
   // suggest results from the extension are current.
   int current_input_id_;
 
   // The input state at the time we last asked the extension for suggest
   // results.
   AutocompleteInput extension_suggest_last_input_;
 
   // We remember the last suggestions we've received from the extension in case
   // we need to reset our matches without asking the extension again.
   std::vector<AutocompleteMatch> extension_suggest_matches_;
 
   // If non-empty, holds the ID of the extension whose keyword is currently in
   // the URL bar while the autocomplete popup is open.
   std::string current_keyword_extension_id_;
 
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(KeywordProvider);
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_KEYWORD_PROVIDER_H_