Improve some naming

chrome/browser/search_engines/search_terms_data.cc

 // Copyright 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/search_engines/search_terms_data.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/prefs/pref_service.h"
@@ skipping 173 matching lines @@
          BrowserThread::CurrentlyOn(BrowserThread::UI));
 #if defined(ENABLE_THEMES)
   if (!chrome::IsInstantExtendedAPIEnabled())
     return std::string();
 
   // TODO(dhollowa): Determine fraction of custom themes that don't affect the
   // NTP background and/or color.
   ThemeService* theme_service = ThemeServiceFactory::GetForProfile(profile_);
   // NTP is considered themed if the theme is not default and not native (GTK+).
   if (theme_service && !theme_service->UsingDefaultTheme() &&
-      !theme_service->UsingNativeTheme())
+      !theme_service->UsingSystemTheme())
     return "es_th=1&";
 #endif  // defined(ENABLE_THEMES)
 
   return std::string();
 }
 
 // static
 void UIThreadSearchTermsData::SetGoogleBaseURL(const std::string& base_url) {
   delete google_base_url_;
   google_base_url_ = base_url.empty() ? NULL : new std::string(base_url);
 }