mash: Move system tray cast code into //ash/common

ash/common/system/chromeos/screen_security/screen_share_tray_item.h

Index: ash/common/system/chromeos/screen_security/screen_share_tray_item.h
diff --git a/ash/system/chromeos/screen_security/screen_share_tray_item.h b/ash/common/system/chromeos/screen_security/screen_share_tray_item.h
similarity index 79%
rename from ash/system/chromeos/screen_security/screen_share_tray_item.h
rename to ash/common/system/chromeos/screen_security/screen_share_tray_item.h
index 736af56ff522432757e68fd3efe9fbe449cab506..2098d40f966ccd65917280d72d43244400476343 100644
--- a/ash/system/chromeos/screen_security/screen_share_tray_item.h
+++ b/ash/common/system/chromeos/screen_security/screen_share_tray_item.h
@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_SYSTEM_CHROMEOS_SCREEN_SHARE_SCREEN_SHARE_TRAY_ITEM_H_
-#define ASH_SYSTEM_CHROMEOS_SCREEN_SHARE_SCREEN_SHARE_TRAY_ITEM_H_
+#ifndef ASH_COMMON_SYSTEM_CHROMEOS_SCREEN_SECURITY_SCREEN_SHARE_TRAY_ITEM_H_
+#define ASH_COMMON_SYSTEM_CHROMEOS_SCREEN_SECURITY_SCREEN_SHARE_TRAY_ITEM_H_
 
 #include "ash/common/system/chromeos/screen_security/screen_share_observer.h"
-#include "ash/system/chromeos/screen_security/screen_tray_item.h"
+#include "ash/common/system/chromeos/screen_security/screen_tray_item.h"
 #include "base/macros.h"
 
 namespace views {
@@ -42,4 +42,4 @@ class ASH_EXPORT ScreenShareTrayItem : public ScreenTrayItem,
 
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_CHROMEOS_SCREEN_SHARE_SCREEN_SHARE_TRAY_ITEM_H_
+#endif  // ASH_COMMON_SYSTEM_CHROMEOS_SCREEN_SECURITY_SCREEN_SHARE_TRAY_ITEM_H_