Fix crash 12519: in views::DialogClientView::AcceptWindow()...

views/window/dialog_client_view.cc

 // Copyright (c) 2006-2008 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 "views/window/dialog_client_view.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <uxtheme.h>
 #include <vsstyle.h>
@@ skipping 351 matching lines @@
   // TODO(port): add accelerators
 #endif
   Close();
   return true;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DialogClientView, ButtonListener implementation:
 
 void DialogClientView::ButtonPressed(Button* sender) {
+  // We NULL check the delegate here since the buttons can receive WM_COMMAND
+  // messages even after they (and the window containing us) are destroyed.
+  if (!GetDialogDelegate())
+    return;
+
   if (sender == ok_button_) {
     AcceptWindow();
   } else if (sender == cancel_button_) {
     CancelWindow();
   } else {
     NOTREACHED();
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ skipping 115 matching lines @@
     initialized = true;
   }
 }
 
 void DialogClientView::Close() {
   window()->Close();
   GetDialogDelegate()->OnClose();
 }
 
 }  // namespace views