chromeos: Remove SystemTrayDelegate::GetIMEManagedMessage()

ash/system/tray/system_tray_delegate.h

 // Copyright (c) 2012 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_SYSTEM_TRAY_SYSTEM_TRAY_DELEGATE_H_
 #define ASH_SYSTEM_TRAY_SYSTEM_TRAY_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 35 matching lines @@
 
   // Returns the currently selected IME.
   virtual void GetCurrentIME(IMEInfo* info);
 
   // Returns a list of availble IMEs.
   virtual void GetAvailableIMEList(IMEInfoList* list);
 
   // Returns a list of properties for the currently selected IME.
   virtual void GetCurrentIMEProperties(IMEPropertyInfoList* list);
 
-  // Returns a non-empty string if IMEs are managed by policy.
-  virtual base::string16 GetIMEManagedMessage();
-
   // Returns NetworkingConfigDelegate. May return nullptr.
   virtual NetworkingConfigDelegate* GetNetworkingConfigDelegate() const;
 
   // Retrieves the session start time. Returns |false| if the time is not set.
   virtual bool GetSessionStartTime(base::TimeTicks* session_start_time);
 
   // Retrieves the session length limit. Returns |false| if no limit is set.
   virtual bool GetSessionLengthLimit(base::TimeDelta* session_length_limit);
 
   // The active user has been changed. This will be called when the UI is ready
   // to be switched to the new user.
   // Note: This will happen after SessionObserver::ActiveUserChanged fires.
   virtual void ActiveUserWasChanged();
 
   // Returns true when the Search key is configured to be treated as Caps Lock.
   virtual bool IsSearchKeyMappedToCapsLock();
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_SYSTEM_TRAY_DELEGATE_H_