Enabled pressing TAB to cycle through the Omnibox results.

chrome/browser/autocomplete/autocomplete_popup_model.cc

 // 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.
 
 #include "chrome/browser/autocomplete/autocomplete_popup_model.h"
 
 #include <algorithm>
 
 #include "unicode/ubidi.h"
 
@@ skipping 118 matching lines @@
 }
 
 bool AutocompletePopupModel::GetKeywordForMatch(const AutocompleteMatch& match,
                                                 string16* keyword) const {
   // Assume we have no keyword until we find otherwise.
   keyword->clear();
 
   // If the current match is a keyword, return that as the selected keyword.
   if (TemplateURL::SupportsReplacement(match.template_url)) {
     keyword->assign(match.template_url->keyword());
+    match.keyword.assign(*keyword);
     return false;
   }
 
   // See if the current match's fill_into_edit corresponds to a keyword.
   if (!profile_->GetTemplateURLModel())
     return false;
   profile_->GetTemplateURLModel()->Load();
   const string16 keyword_hint(TemplateURLModel::CleanUserInputKeyword(
       match.fill_into_edit));
   if (keyword_hint.empty())
     return false;
 
   // Don't provide a hint if this keyword doesn't support replacement.
   const TemplateURL* const template_url =
       profile_->GetTemplateURLModel()->GetTemplateURLForKeyword(keyword_hint);
   if (!TemplateURL::SupportsReplacement(template_url))
     return false;
 
   // Don't provide a hint for inactive/disabled extension keywords.
   if (template_url->IsExtensionKeyword()) {
     const Extension* extension = profile_->GetExtensionService()->
         GetExtensionById(template_url->GetExtensionId(), false);
     if (!extension ||
         (profile_->IsOffTheRecord() &&
          !profile_->GetExtensionService()->IsIncognitoEnabled(extension)))
       return false;
   }
 
   keyword->assign(keyword_hint);
+  match.keyword.assign(keyword_hint);
   return true;
 }
 
 void AutocompletePopupModel::Move(int count) {
   const AutocompleteResult& result = this->result();
   if (result.empty())
     return;
 
   // The user is using the keyboard to change the selection, so stop tracking
   // hover.
@@ skipping 54 matching lines @@
   CHECK((selected_line_ != kNoMatch) || result.empty());
   manually_selected_match_.Clear();
   // If we're going to trim the window size to no longer include the hovered
   // line, turn hover off.  Practically, this shouldn't happen, but it
   // doesn't hurt to be defensive.
   if ((hovered_line_ != kNoMatch) && (result.size() <= hovered_line_))
     SetHoveredLine(kNoMatch);
 
   view_->UpdatePopupAppearance();
 }