Fix for clang chromium-style in promo.

chrome/browser/web_resource/notification_promo_mobile_ntp.cc

Index: chrome/browser/web_resource/notification_promo_mobile_ntp.cc
diff --git a/chrome/browser/web_resource/notification_promo_mobile_ntp.cc b/chrome/browser/web_resource/notification_promo_mobile_ntp.cc
index 407df44e6b376835d96eb31b94d2ab072adbbda1..3676c815078c87497b030609cefdded5eadedc9b 100644
--- a/chrome/browser/web_resource/notification_promo_mobile_ntp.cc
+++ b/chrome/browser/web_resource/notification_promo_mobile_ntp.cc
@@ -16,6 +16,9 @@ NotificationPromoMobileNtp::NotificationPromoMobileNtp(Profile* profile)
       notification_promo_(profile) {
 }
 
+NotificationPromoMobileNtp::~NotificationPromoMobileNtp() {
+}
+
 bool NotificationPromoMobileNtp::InitFromPrefs() {
   notification_promo_.InitFromPrefs(NotificationPromo::MOBILE_NTP_SYNC_PROMO);
   return InitFromNotificationPromo();