Use the extension icon for extension omnibox results instead of the generic

chrome/browser/gtk/location_bar_view_gtk.h

 // Copyright (c) 2010 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_GTK_LOCATION_BAR_VIEW_GTK_H_
 #define CHROME_BROWSER_GTK_LOCATION_BAR_VIEW_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include <map>
@@ skipping 344 matching lines @@
 
   // Extension page action icons.
   OwnedWidgetGtk page_action_hbox_;
   ScopedVector<PageActionViewGtk> page_action_views_;
 
   // The widget that contains our tab hints and the location bar.
   GtkWidget* entry_box_;
 
   // Area on the left shown when in tab to search mode.
   GtkWidget* tab_to_search_box_;
+  GtkWidget* tab_to_search_magnifier_;
   GtkWidget* tab_to_search_full_label_;
   GtkWidget* tab_to_search_partial_label_;
 
   // Hint to user that they can tab-to-search by hitting tab.
   GtkWidget* tab_to_search_hint_;
   GtkWidget* tab_to_search_hint_leading_label_;
   GtkWidget* tab_to_search_hint_icon_;
   GtkWidget* tab_to_search_hint_trailing_label_;
 
   scoped_ptr<AutocompleteEditViewGtk> location_entry_;
@@ skipping 35 matching lines @@
   // Width of the hbox that holds |tab_to_search_box_|, |location_entry_| and
   // |tab_to_search_hint_|.
   int entry_box_width_;
 
   // Indicate if |tab_to_search_box_| should be shown.
   bool show_selected_keyword_;
 
   // Indicate if |tab_to_search_hint_| should be shown.
   bool show_keyword_hint_;
 
+  // The last search keyword that was shown via the |tab_to_search_box_|.
+  std::wstring last_keyword_;
+
   DISALLOW_COPY_AND_ASSIGN(LocationBarViewGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_LOCATION_BAR_VIEW_GTK_H_