Media indicator for background recording task

ash/system/tray/system_tray_notifier.h

Index: ash/system/tray/system_tray_notifier.h
diff --git a/ash/system/tray/system_tray_notifier.h b/ash/system/tray/system_tray_notifier.h
index 29cd9d2bb3fb66225b2ad168e527eae2e3f71fa1..6e6b03fc97d7b4dbf7e13e9234c6b26b1f3656f9 100644
--- a/ash/system/tray/system_tray_notifier.h
+++ b/ash/system/tray/system_tray_notifier.h
@@ -30,6 +30,7 @@
 #include "ash/system/chromeos/session/last_window_closed_observer.h"
 #include "ash/system/chromeos/session/logout_button_observer.h"
 #include "ash/system/chromeos/session/session_length_limit_observer.h"
+#include "ash/system/tray/media_security/media_capture_observer.h"
 #include "base/time/time.h"
 #endif
 
@@ -92,6 +93,9 @@ class ASH_EXPORT SystemTrayNotifier {
   void AddEnterpriseDomainObserver(EnterpriseDomainObserver* observer);
   void RemoveEnterpriseDomainObserver(EnterpriseDomainObserver* observer);
 
+  void AddMediaCaptureObserver(MediaCaptureObserver* observer);
+  void RemoveMediaCaptureObserver(MediaCaptureObserver* observer);
+
   void AddScreenCaptureObserver(ScreenCaptureObserver* observer);
   void RemoveScreenCaptureObserver(ScreenCaptureObserver* observer);
 
@@ -133,6 +137,7 @@ class ASH_EXPORT SystemTrayNotifier {
   void NotifyRequestToggleWifi();
   void NotifyOnCaptivePortalDetected(const std::string& service_path);
   void NotifyEnterpriseDomainChanged();
+  void NotifyMediaCaptureChanged();
   void NotifyScreenCaptureStart(const base::Closure& stop_callback,
                                 const base::string16& sharing_app_name);
   void NotifyScreenCaptureStop();
@@ -164,6 +169,7 @@ class ASH_EXPORT SystemTrayNotifier {
   ObserverList<NetworkPortalDetectorObserver>
       network_portal_detector_observers_;
   ObserverList<EnterpriseDomainObserver> enterprise_domain_observers_;
+  ObserverList<MediaCaptureObserver> media_capture_observers_;
   ObserverList<ScreenCaptureObserver> screen_capture_observers_;
   ObserverList<ScreenShareObserver> screen_share_observers_;
   ObserverList<LastWindowClosedObserver> last_window_closed_observers_;