Add SystemTrayObservers

chrome/browser/chromeos/sms_observer.cc

Index: chrome/browser/chromeos/sms_observer.cc
diff --git a/chrome/browser/chromeos/sms_observer.cc b/chrome/browser/chromeos/sms_observer.cc
index 866568f3e4afac01b83809dd1d3d4cd34a7be249..431fc8725b9f781b93a9aca262e55b9b070b1840 100644
--- a/chrome/browser/chromeos/sms_observer.cc
+++ b/chrome/browser/chromeos/sms_observer.cc
@@ -7,6 +7,7 @@
 #include "ash/shell.h"
 #include "ash/system/chromeos/network/sms_observer.h"
 #include "ash/system/tray/system_tray.h"
+#include "ash/system/tray/system_tray_notifier.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "grit/generated_resources.h"
@@ -111,8 +112,7 @@ void SmsObserver::OnNewMessage(const std::string& modem_device_path,
   base::DictionaryValue dict;
   dict.SetString(ash::kSmsNumberKey, message.number);
   dict.SetString(ash::kSmsTextKey, message.text);
-  if (ash::Shell::GetInstance()->status_area_widget())
-    ash::Shell::GetInstance()->system_tray()->sms_observer()->AddMessage(dict);
+  ash::Shell::GetInstance()->system_tray_notifier()->NotifyAddSmsMessage(dict);
 }
 
 }  // namespace chromeos