Enabled pressing TAB to cycle through the Omnibox results.

chrome/browser/autocomplete/autocomplete.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_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 652 matching lines @@
 
   // Asks the relevant provider to delete |match|, and ensures observers are
   // notified of resulting changes immediately.  This should only be called when
   // no query is running.
   void DeleteMatch(const AutocompleteMatch& match);
 
   // Removes any entries that were copied from the last result. This is used by
   // the popup to ensure it's not showing an out-of-date query.
   void ExpireCopiedEntries();
 
+  // Gets the selected keyword for the given text.

[Peter Kasting, 2011/04/11 23:17:33]

Nit: This comment is wrong.  Should be something like:

// 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;
+
   SearchProvider* search_provider() const { return search_provider_; }
 
   // Getters
   const AutocompleteInput& input() const { return input_; }
   const AutocompleteResult& result() const { return result_; }
   bool done() const { return done_; }
 
   // From AutocompleteProvider::Listener
   virtual void OnProviderUpdate(bool updated_matches);
 
@@ skipping 23 matching lines @@
   // Input passed to Start.
   AutocompleteInput input_;
 
   // Data from the autocomplete query.
   AutocompleteResult result_;
 
   // Timer used to remove any matches copied from the last result. When run
   // invokes |ExpireCopiedEntries|.
   base::OneShotTimer<AutocompleteController> expire_timer_;
 
+  Profile* profile_;
+
   // True if a query is not currently running.
   bool done_;
 
   // Are we in Start()? This is used to avoid updating |result_| and sending
   // notifications until Start() has been invoked on all providers.
   bool in_start_;
 
   DISALLOW_COPY_AND_ASSIGN(AutocompleteController);
 };
 
@@ skipping 19 matching lines @@
   AutocompleteInput::Type input_type;
   // Selected index (if selected) or -1 (AutocompletePopupModel::kNoMatch).
   size_t selected_index;
   // Inline autocompleted length (if displayed).
   size_t inline_autocompleted_length;
   // Result set.
   const AutocompleteResult& result;
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_H_