Media indicator for background recording task

ash/system/tray/system_tray_notifier.cc

Index: ash/system/tray/system_tray_notifier.cc
diff --git a/ash/system/tray/system_tray_notifier.cc b/ash/system/tray/system_tray_notifier.cc
index ed858c3f9fb3ea1290c24c00d5ff56c2649b570e..5801ce6b5b9c4c82dda0c0a3faf5f856717b42d1 100644
--- a/ash/system/tray/system_tray_notifier.cc
+++ b/ash/system/tray/system_tray_notifier.cc
@@ -151,6 +151,16 @@ void SystemTrayNotifier::RemoveEnterpriseDomainObserver(
   enterprise_domain_observers_.RemoveObserver(observer);
 }
 
+void SystemTrayNotifier::AddMediaCaptureObserver(
+    MediaCaptureObserver* observer) {
+  media_capture_observers_.AddObserver(observer);
+}
+
+void SystemTrayNotifier::RemoveMediaCaptureObserver(
+    MediaCaptureObserver* observer) {
+  media_capture_observers_.RemoveObserver(observer);
+}
+
 void SystemTrayNotifier::AddScreenCaptureObserver(
     ScreenCaptureObserver* observer) {
   screen_capture_observers_.AddObserver(observer);
@@ -354,6 +364,11 @@ void SystemTrayNotifier::NotifyEnterpriseDomainChanged() {
       OnEnterpriseDomainChanged());
 }
 
+void SystemTrayNotifier::NotifyMediaCaptureChanged() {
+  FOR_EACH_OBSERVER(
+      MediaCaptureObserver, media_capture_observers_, OnMediaCaptureChanged());
+}
+
 void SystemTrayNotifier::NotifyScreenCaptureStart(
     const base::Closure& stop_callback,
     const base::string16& sharing_app_name) {