chromeos: Remove ash::SystemTrayDelegate::CreateTrayRotationLock

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 <memory>
 #include <string>
 #include <vector>
 
 #include "ash/ash_export.h"
-#include "base/callback_forward.h"
-#include "base/files/file_path.h"
 #include "base/i18n/time_formatting.h"
 #include "base/strings/string16.h"
 
 namespace base {
 class TimeDelta;
 class TimeTicks;
 }
 
 namespace ash {
 struct IMEInfo;
 struct IMEPropertyInfo;
 
-class SystemTray;
-class SystemTrayItem;
-
 using IMEInfoList = std::vector<IMEInfo>;
 using IMEPropertyInfoList = std::vector<IMEPropertyInfo>;
 
 class NetworkingConfigDelegate;
 
 // SystemTrayDelegate is intended for delegating tasks in the System Tray to the
 // application (e.g. Chrome). These tasks should be limited to application
 // (browser) specific tasks. For non application specific tasks, where possible,
 // components/, chromeos/, device/, etc., code should be used directly.
 //
@@ skipping 37 matching lines @@
   // 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();
-
-  // Creates a system tray item for display rotation lock.
-  // TODO(jamescook): Remove this when mus has support for display management
-  // and we have a DisplayManager equivalent. See http://crbug.com/548429
-  virtual std::unique_ptr<SystemTrayItem> CreateRotationLockTrayItem(
-      SystemTray* tray);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_SYSTEM_TRAY_DELEGATE_H_