Enabled pressing TAB to cycle through the Omnibox results.

chrome/browser/autocomplete/search_provider.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/search_provider.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/callback.h"
@@ skipping 854 matching lines @@
   // values preserve that property.  Otherwise, if the user starts editing a
   // suggestion, non-Search results will suddenly appear.
   size_t search_start = 0;
   if (input_.type() == AutocompleteInput::FORCED_QUERY) {
     match.fill_into_edit.assign(ASCIIToUTF16("?"));
     ++search_start;
   }
   if (is_keyword) {
     match.fill_into_edit.append(
         providers_.keyword_provider().keyword() + char16(' '));
-    search_start += providers_.keyword_provider().keyword().size() + 1;
+
+    match.keyword = providers_.keyword_provider().keyword();
+    search_start += match.keyword.size() + 1;
   }
   match.fill_into_edit.append(query_string);
   // Not all suggestions start with the original input.
   if (!prevent_inline_autocomplete &&
       !match.fill_into_edit.compare(search_start, input_text.length(),
                                    input_text))
     match.inline_autocomplete_offset = search_start + input_text.length();
 
   const TemplateURLRef* const search_url = provider.url();
   DCHECK(search_url->SupportsReplacement());
@@ skipping 58 matching lines @@
 
   return match;
 }
 
 void SearchProvider::UpdateDone() {
   // We're done when there are no more suggest queries pending (this is set to 1
   // when the timer is started) and we're not waiting on instant.
   done_ = ((suggest_results_pending_ == 0) &&
            (instant_finalized_ || !InstantController::IsEnabled(profile_)));
 }