Remove the enable_themes build flag and define.

chrome/browser/ui/webui/about_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/about_ui.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 53 matching lines @@
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request_status.h"
 #include "third_party/brotli/dec/decode.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/webui/jstemplate_builder.h"
 #include "ui/base/webui/web_ui_util.h"
 #include "url/gurl.h"
 
-#if defined(ENABLE_THEMES)
+#if !defined(OS_ANDROID)
 #include "chrome/browser/ui/webui/theme_source.h"
 #endif
 
 #if defined(OS_LINUX) || defined(OS_OPENBSD)
 #include "content/public/browser/zygote_host_linux.h"
 #include "content/public/common/sandbox_linux.h"
 #endif
 
 #if defined(OS_WIN)
 #include "chrome/browser/win/enumerate_modules_model.h"
@@ skipping 763 matching lines @@
     return false;
   }
 #endif
   return content::URLDataSource::ShouldDenyXFrameOptions();
 }
 
 AboutUI::AboutUI(content::WebUI* web_ui, const std::string& name)
     : WebUIController(web_ui) {
   Profile* profile = Profile::FromWebUI(web_ui);
 
-#if defined(ENABLE_THEMES)
+#if !defined(OS_ANDROID)
   // Set up the chrome://theme/ source.
   ThemeSource* theme = new ThemeSource(profile);
   content::URLDataSource::Add(profile, theme);
 #endif
 
   content::URLDataSource::Add(profile, new AboutUIHTMLSource(name, profile));
 }