Remove the enable_themes build flag and define.

chrome/browser/ui/webui/md_downloads/md_downloads_ui.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/webui/md_downloads/md_downloads_ui.h"
 
 #include "base/memory/ref_counted_memory.h"
 #include "base/memory/singleton.h"
 #include "base/strings/string_piece.h"
 #include "base/threading/thread.h"
@@ skipping 130 matching lines @@
 MdDownloadsUI::MdDownloadsUI(content::WebUI* web_ui) : WebUIController(web_ui) {
   Profile* profile = Profile::FromWebUI(web_ui);
   DownloadManager* dlm = BrowserContext::GetDownloadManager(profile);
 
   handler_ = new MdDownloadsDOMHandler(dlm, web_ui);
   web_ui->AddMessageHandler(handler_);
 
   // Set up the chrome://downloads/ source.
   content::WebUIDataSource* source = CreateDownloadsUIHTMLSource(profile);
   content::WebUIDataSource::Add(profile, source);
-#if defined(ENABLE_THEMES)
   ThemeSource* theme = new ThemeSource(profile);
   content::URLDataSource::Add(profile, theme);
-#endif
 }
 
 // static
 base::RefCountedMemory* MdDownloadsUI::GetFaviconResourceBytes(
     ui::ScaleFactor scale_factor) {
   return ResourceBundle::GetSharedInstance().
       LoadDataResourceBytesForScale(IDR_DOWNLOADS_FAVICON, scale_factor);
 }