#include "chrome/common/url_constants.h"
#include "content/public/browser/user_metrics.h"
#include "extensions/browser/extension_prefs.h"
+#include "extensions/browser/extension_system.h"
#include "grit/chromium_strings.h"
#include "grit/generated_resources.h"
#include "ui/base/l10n/l10n_util.h"