Fix build when ENABLE_MANAGED_USERS is not defined

chrome/browser/ui/webui/downloads_ui_browsertest.cc

Index: chrome/browser/ui/webui/downloads_ui_browsertest.cc
diff --git a/chrome/browser/ui/webui/downloads_ui_browsertest.cc b/chrome/browser/ui/webui/downloads_ui_browsertest.cc
index eafa4600f09e04cf1dbdbe27354db3b08d60f50d..d2850c983c58d233c35445f2ba9259e7c494b217 100644
--- a/chrome/browser/ui/webui/downloads_ui_browsertest.cc
+++ b/chrome/browser/ui/webui/downloads_ui_browsertest.cc
@@ -7,8 +7,6 @@
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/supervised_user/supervised_user_service.h"
-#include "chrome/browser/supervised_user/supervised_user_service_factory.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
@@ -23,7 +21,9 @@ void DownloadsUIBrowserTest::SetDeleteAllowed(bool allowed) {
       SetBoolean(prefs::kAllowDeletingBrowserHistory, allowed);
 }
 
+#if defined(ENABLE_MANAGED_USERS)
 void DownloadsWebUIForSupervisedUsersTest::SetUpCommandLine(
     CommandLine* command_line) {
   command_line->AppendSwitchASCII(switches::kSupervisedUserId, "asdf");
 }
+#endif