Don't call Chrome::print() if there is a provisional DocumentLoader

Source/core/frame/DOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 961 matching lines @@
 
 void DOMWindow::print()
 {
     if (!m_frame)
         return;
 
     FrameHost* host = m_frame->host();
     if (!host)
         return;
 
-    if (m_frame->loader().documentLoader()->isLoading()) {
+    if (m_frame->loader().provisionalDocumentLoader() || m_frame->loader().documentLoader()->isLoading()) {
         m_shouldPrintWhenFinishedLoading = true;
         return;
     }
     m_shouldPrintWhenFinishedLoading = false;
     host->chrome().print(m_frame);
 }
 
 void DOMWindow::stop()
 {
     if (!m_frame)
@@ skipping 867 matching lines @@
     return static_cast<DOMWindowLifecycleNotifier&>(LifecycleContext<DOMWindow>::lifecycleNotifier());
 }
 
 PassOwnPtr<LifecycleNotifier<DOMWindow> > DOMWindow::createLifecycleNotifier()
 {
     return DOMWindowLifecycleNotifier::create(this);
 }
 
 
 } // namespace WebCore