Add an extra guard to replaceDocument()

Source/core/frame/LocalFrame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 528 matching lines @@
             continue;
         if (equalIgnoringFragmentIdentifier(toLocalFrame(frame)->document()->url(), url)) {
             if (foundSelfReference)
                 return false;
             foundSelfReference = true;
         }
     }
     return true;
 }
 
+bool LocalFrame::shouldReuseDefaultView(const KURL& url) const
+{
+    return loader().stateMachine()->isDisplayingInitialEmptyDocument() && document()->isSecureTransitionTo(url);
+}
+
 void LocalFrame::removeSpellingMarkersUnderWords(const Vector<String>& words)
 {
     spellChecker().removeSpellingMarkersUnderWords(words);
 }
 
 struct ScopedFramePaintingState {
     ScopedFramePaintingState(LocalFrame* frame, Node* node)
         : frame(frame)
         , node(node)
         , paintBehavior(frame->view()->paintBehavior())
@@ skipping 106 matching lines @@
 LocalFrame* LocalFrame::localFrameRoot()
 {
     LocalFrame* curFrame = this;
     while (curFrame && curFrame->tree().parent() && curFrame->tree().parent()->isLocalFrame())
         curFrame = toLocalFrame(curFrame->tree().parent());
 
     return curFrame;
 }
 
 } // namespace blink