Add TraySms for SMS messages.

ash/system/tray/system_tray_item.cc

Index: ash/system/tray/system_tray_item.cc
diff --git a/ash/system/tray/system_tray_item.cc b/ash/system/tray/system_tray_item.cc
index 61ea10f528247980b67663161e583bf5605c9fe7..d11a1091dc762aa2dd7612b7ed6dfc82171c5315 100644
--- a/ash/system/tray/system_tray_item.cc
+++ b/ash/system/tray/system_tray_item.cc
@@ -49,6 +49,9 @@ void SystemTrayItem::TransitionDetailedView() {
       BUBBLE_USE_EXISTING);
 }
 
+void SystemTrayItem::UpdateAfterLoginStatusChange(user::LoginStatus status) {
+}
+
 void SystemTrayItem::PopupDetailedView(int for_seconds, bool activate) {
   Shell::GetInstance()->tray()->ShowDetailedView(this, for_seconds, activate,
       BUBBLE_CREATE_NEW);
@@ -58,6 +61,10 @@ void SystemTrayItem::SetDetailedViewCloseDelay(int for_seconds) {
   Shell::GetInstance()->tray()->SetDetailedViewCloseDelay(for_seconds);
 }
 
+void SystemTrayItem::HideDetailedView() {
+  Shell::GetInstance()->tray()->HideDetailedView(this);
+}
+
 void SystemTrayItem::ShowNotificationView() {
   Shell::GetInstance()->tray()->ShowNotificationView(this);
 }