Add update available icon in system tray

chrome/browser/upgrade_detector.cc

Index: chrome/browser/upgrade_detector.cc
diff --git a/chrome/browser/upgrade_detector.cc b/chrome/browser/upgrade_detector.cc
index 2dfd1a91560d353cf9753dfa8654eeb8046c4483..c9cbc01aa349b06f641094691f756d81bd17fcf5 100644
--- a/chrome/browser/upgrade_detector.cc
+++ b/chrome/browser/upgrade_detector.cc
@@ -87,6 +87,10 @@ void UpgradeDetector::NotifyUpgradeRecommended() {
   }
 }
 
+void UpgradeDetector::NotifyUpdateOverCellularAvailable() {
+  TriggerNotification(chrome::NOTIFICATION_UPDATE_OVER_CELLULAR_AVAILABLE);
+}
+
 void UpgradeDetector::TriggerCriticalUpdate() {
   const base::TimeDelta idle_timer = UseTestingIntervals() ?
       base::TimeDelta::FromSeconds(kIdleRepeatingTimerWait) :