If the window handle is destroyed because of an owner being destroyed, ensure any disabled windows …

ui/views/win/hwnd_message_handler.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/views/win/hwnd_message_handler.h"
 
 #include <dwmapi.h>
 #include <oleacc.h>
 #include <shellapi.h>
 #include <tchar.h>
@@ skipping 879 matching lines @@
   if (!processed) {
     result = DefWindowProc(window, message, w_param, l_param);
     // DefWindowProc() may have destroyed the window and/or us in a nested
     // message loop.
     if (!ref || !::IsWindow(window))
       return result;
   }
 
   if (delegate_) {
     delegate_->PostHandleMSG(message, w_param, l_param);
-    if (message == WM_NCDESTROY)
+    if (message == WM_NCDESTROY) {
+      RestoreEnabledIfNecessary();
       delegate_->HandleDestroyed();
+    }
   }
 
   if (message == WM_ACTIVATE && IsTopLevelWindow(window))
     PostProcessActivateMessage(LOWORD(w_param), !!HIWORD(w_param),
                                reinterpret_cast<HWND>(l_param));
   return result;
 }
 
 LRESULT HWNDMessageHandler::HandleMouseMessage(unsigned int message,
                                                WPARAM w_param,
@@ skipping 1734 matching lines @@
     delegate_->HandleClientSizeChanged(GetClientAreaBounds().size());
     ResetWindowRegion(false, true);
   }
 
   if (direct_manipulation_helper_)
     direct_manipulation_helper_->SetBounds(bounds_in_pixels);
 }
 
 
 }  // namespace views