Remove the enable_themes build flag and define.

chrome/browser/search/instant_service.h

 // Copyright 2013 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_SEARCH_INSTANT_SERVICE_H_
 #define CHROME_BROWSER_SEARCH_INSTANT_SERVICE_H_
 
 #include <memory>
 #include <set>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
+#include "build/build_config.h"
 #include "components/history/core/browser/history_types.h"
 #include "components/history/core/browser/top_sites_observer.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "components/ntp_tiles/most_visited_sites.h"
 #include "components/ntp_tiles/ntp_tile.h"
 #include "components/search_engines/template_url_service_observer.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "url/gurl.h"
 
@@ skipping 111 matching lines @@
   void OnTopSitesReceived(const history::MostVisitedURLList& data);
 
   // ntp_tiles::MostVisitedSites::Observer implementation.
   void OnMostVisitedURLsAvailable(
       const ntp_tiles::NTPTilesVector& tiles) override;
   void OnIconMadeAvailable(const GURL& site_url) override;
 
   // Notifies the observer about the last known most visited items.
   void NotifyAboutMostVisitedItems();
 
-#if defined(ENABLE_THEMES)
+#if !defined(OS_ANDROID)
   // Theme changed notification handler.
   void OnThemeChanged();
 #endif
 
   void ResetInstantSearchPrerendererIfNecessary();
 
   Profile* const profile_;
 
   // The TemplateURLService that we are observing. It will outlive this
   // InstantService due to the dependency declared in InstantServiceFactory.
@@ skipping 27 matching lines @@
   std::unique_ptr<ntp_tiles::MostVisitedSites> most_visited_sites_;
   scoped_refptr<history::TopSites> top_sites_;
 
   // Used for Top Sites async retrieval.
   base::WeakPtrFactory<InstantService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantService);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_INSTANT_SERVICE_H_