The continue window is owned by the desktop environment now.

remoting/host/disconnect_window_mac.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 
 #import "remoting/host/disconnect_window_mac.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 43 matching lines @@
   // DisconnectWindowController is responsible for releasing itself in its
   // windowWillClose: method.
   [window_controller_ Hide];
   window_controller_ = nil;
 }
 
 void DisconnectWindowMac::Start(
     const base::WeakPtr<ClientSessionControl>& client_session_control) {
   DCHECK(CalledOnValidThread());
   DCHECK(client_session_control);
-  DCHECK(!disconnect_window_);
 
   // Create the window.
   base::Closure disconnect_callback =
       base::Bind(&ClientSessionControl::DisconnectSession,
                  client_session_control);
   std::string client_jid = client_session_control->client_jid();
   std::string username = client_jid.substr(0, client_jid.find('/'));
   window_controller_ =
       [[DisconnectWindowController alloc] initWithUiStrings:&ui_strings_
                                                    callback:disconnect_callback
@@ skipping 218 matching lines @@
   path = [NSBezierPath bezierPath];
   [path moveToPoint:top];
   [path lineToPoint:bottom];
   [light setStroke];
   [path stroke];
 
   [context setShouldAntialias:alias];
 }
 
 @end