mash: Migrate remaining tray observers and notify functions.

ash/system/chromeos/media_security/multi_profile_media_tray_item.h

Index: ash/system/chromeos/media_security/multi_profile_media_tray_item.h
diff --git a/ash/system/tray/media_security/multi_profile_media_tray_item.h b/ash/system/chromeos/media_security/multi_profile_media_tray_item.h
similarity index 79%
rename from ash/system/tray/media_security/multi_profile_media_tray_item.h
rename to ash/system/chromeos/media_security/multi_profile_media_tray_item.h
index 4179eda6c3d3cbba99de5a78e3619ad9db2ab049..bbddc636b4ea6c6bea637f092297896e8aa75286 100644
--- a/ash/system/tray/media_security/multi_profile_media_tray_item.h
+++ b/ash/system/chromeos/media_security/multi_profile_media_tray_item.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_SYSTEM_CHROMEOS_MULTI_PROFILE_MEDIA_TRAY_ITEM_H_
-#define ASH_SYSTEM_CHROMEOS_MULTI_PROFILE_MEDIA_TRAY_ITEM_H_
+#ifndef ASH_SYSTEM_CHROMEOS_MEDIA_SECURITY_MULTI_PROFILE_MEDIA_TRAY_ITEM_H_
+#define ASH_SYSTEM_CHROMEOS_MEDIA_SECURITY_MULTI_PROFILE_MEDIA_TRAY_ITEM_H_
 
 #include "ash/common/system/tray/system_tray_item.h"
 #include "base/macros.h"
@@ -33,4 +33,4 @@ class ASH_EXPORT MultiProfileMediaTrayItem : public SystemTrayItem {
 
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_CHROMEOS_MULTI_PROFILE_MEDIA_TRAY_ITEM_H_
+#endif  // ASH_SYSTEM_CHROMEOS_MEDIA_SECURITY_MULTI_PROFILE_MEDIA_TRAY_ITEM_H_