chromeos: Move files in //ash/common to //ash, part 1

ash/common/system/chromeos/supervised/custodian_info_tray_observer.h

Index: ash/common/system/chromeos/supervised/custodian_info_tray_observer.h
diff --git a/ash/common/system/chromeos/supervised/custodian_info_tray_observer.h b/ash/common/system/chromeos/supervised/custodian_info_tray_observer.h
deleted file mode 100644
index 4df0a9a5044b4e137c249f2c52ef77ab01bc883f..0000000000000000000000000000000000000000
--- a/ash/common/system/chromeos/supervised/custodian_info_tray_observer.h
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef ASH_COMMON_SYSTEM_CHROMEOS_SUPERVISED_CUSTODIAN_INFO_TRAY_OBSERVER_H_
-#define ASH_COMMON_SYSTEM_CHROMEOS_SUPERVISED_CUSTODIAN_INFO_TRAY_OBSERVER_H_
-
-namespace ash {
-
-// Used to observe SystemTrayDelegate.
-class CustodianInfoTrayObserver {
- public:
-  // Called when information about the supervised user's custodian is changed,
-  // e.g. the display name.
-  virtual void OnCustodianInfoChanged() = 0;
-
- protected:
-  virtual ~CustodianInfoTrayObserver() {}
-};
-
-}  // namespace ash
-
-#endif  // ASH_COMMON_SYSTEM_CHROMEOS_SUPERVISED_CUSTODIAN_INFO_TRAY_OBSERVER_H_