Removal of drag window to user tray icon functionality

ash/session_state_delegate.h

 // Copyright (c) 2013 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_SESSION_STATE_DELEGATE_H_
 #define ASH_SESSION_STATE_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 91 matching lines @@
   // (if that user has already signed in).
   virtual void SwitchActiveUser(const std::string& user_id) = 0;
 
   // Switches the active user to the next or previous user, with the same
   // ordering as GetLoggedInUsers.
   virtual void CycleActiveUser(CycleUser cycle_user) = 0;
 
   // Adds or removes sessions state observer.
   virtual void AddSessionStateObserver(SessionStateObserver* observer) = 0;
   virtual void RemoveSessionStateObserver(SessionStateObserver* observer) = 0;
-
-  // Transfers the visibility of a window to another user. Returns true when
-  // transfer was done. This could fail if the |window| belongs to no one and
-  // is therefore shown on the desktop of every user.
-  virtual bool TransferWindowToDesktopOfUser(
-      aura::Window* window,
-      ash::MultiProfileIndex index) = 0;
 };
 
 }  // namespace ash
 
 #endif  // ASH_SESSION_STATE_DELEGATE_H_