remove CHECK in RemoteRootWindowHostWin::Disconnected

ui/aura/remote_root_window_host_win.cc

 // 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.
 
 #include "ui/aura/remote_root_window_host_win.h"
 
 #include <windows.h>
 
 #include <algorithm>
 
@@ skipping 132 matching lines @@
   g_instance = NULL;
 }
 
 void RemoteRootWindowHostWin::Connected(IPC::Sender* host, HWND remote_window) {
   CHECK(host_ == NULL);
   host_ = host;
   remote_window_ = remote_window;
 }
 
 void RemoteRootWindowHostWin::Disconnected() {
-  CHECK(host_ != NULL);

[sky, 2013/11/06 21:28:48]

Please add a comment that we already be disconnected.

   host_ = NULL;
   remote_window_ = NULL;
 }
 
 bool RemoteRootWindowHostWin::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(RemoteRootWindowHostWin, message)
     IPC_MESSAGE_HANDLER(MetroViewerHostMsg_MouseMoved, OnMouseMoved)
     IPC_MESSAGE_HANDLER(MetroViewerHostMsg_MouseButton, OnMouseButton)
     IPC_MESSAGE_HANDLER(MetroViewerHostMsg_KeyDown, OnKeyDown)
@@ skipping 445 matching lines @@
 }
 
 void RemoteRootWindowHostWin::SetEventFlags(uint32 flags) {
   if (flags == event_flags_)
     return;
   event_flags_ = flags;
   SetVirtualKeyStates(event_flags_);
 }
 
 }  // namespace aura