Eliminate the "clock" icon in the omnibox dropdown. The distinction between this and the globe was…

chrome/browser/ui/gtk/omnibox/omnibox_popup_view_gtk.cc

 // Copyright (c) 2012 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/ui/gtk/omnibox/omnibox_popup_view_gtk.h"
 
 #include <gtk/gtk.h>
 
 #include <algorithm>
 #include <string>
@@ skipping 495 matching lines @@
     icon = AutocompleteMatch::TypeToIcon(match.type);
 
   if (selected) {
     switch (icon) {
       case IDR_OMNIBOX_EXTENSION_APP:
         icon = IDR_OMNIBOX_EXTENSION_APP_DARK;
         break;
       case IDR_OMNIBOX_HTTP:
         icon = IDR_OMNIBOX_HTTP_DARK;
         break;
-      case IDR_OMNIBOX_HISTORY:
-        icon = IDR_OMNIBOX_HISTORY_DARK;
-        break;
       case IDR_OMNIBOX_SEARCH:
         icon = IDR_OMNIBOX_SEARCH_DARK;
         break;
       case IDR_OMNIBOX_STAR:
         icon = IDR_OMNIBOX_STAR_DARK;
         break;
       case IDR_OMNIBOX_TTS:
         icon = IDR_OMNIBOX_TTS_DARK;
         break;
       default:
@@ skipping 204 matching lines @@
                               theme_service_->GetImageNamed(
                                   is_selected ? IDR_OMNIBOX_TTS_DARK :
                                   IDR_OMNIBOX_TTS),
                               icon_start_x, line_rect.y() + kIconTopPadding);
     }
   }
 
   cairo_destroy(cr);
   return TRUE;
 }