Migrate md history test code to ScopedFeatureList.

chrome/browser/history/history_browsertest.cc

Index: chrome/browser/history/history_browsertest.cc
diff --git a/chrome/browser/history/history_browsertest.cc b/chrome/browser/history/history_browsertest.cc
index 13af0c33e7d4626556b5b430cc93c6973f025704..fe0c902d7aa8bc8a7743ef66b30d88099f59461a 100644
--- a/chrome/browser/history/history_browsertest.cc
+++ b/chrome/browser/history/history_browsertest.cc
@@ -11,6 +11,7 @@
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/test/scoped_feature_list.h"
 #include "build/build_config.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/history/history_service_factory.h"
@@ -19,7 +20,7 @@
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
-#include "chrome/browser/ui/webui/md_history_ui.h"
+#include "chrome/common/chrome_features.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
@@ -261,7 +262,8 @@ IN_PROC_BROWSER_TEST_F(HistoryBrowserTest,
 IN_PROC_BROWSER_TEST_F(HistoryBrowserTest, MAYBE_HistorySearchXSS) {
   // TODO(tsergeant): Enable this test on MD History once it is possible to pass
   // in a query via URL (crbug.com/619799).
-  MdHistoryUI::SetEnabledForTesting(false);
+  base::test::ScopedFeatureList scoped_feature_list;
+  scoped_feature_list.InitAndDisableFeature(features::kMaterialDesignHistory);
 
   GURL url(std::string(chrome::kChromeUIHistoryURL) +
       "#q=%3Cimg%20src%3Dx%3Ax%20onerror%3D%22document.title%3D'XSS'%22%3E");