Fix the logic that limits the number of frames in a page.

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 694 matching lines @@
             return nextCharacterRange.release();
     }
 
     return nullptr;
 }
 
 bool LocalFrame::isURLAllowed(const KURL& url) const
 {
     // We allow one level of self-reference because some sites depend on that,
     // but we don't allow more than one.
-    if (host()->subframeCount() >= FrameHost::maxNumberOfFrames)
-        return false;
     bool foundSelfReference = false;
     for (const Frame* frame = this; frame; frame = frame->tree().parent()) {
         if (!frame->isLocalFrame())
             continue;
         if (equalIgnoringFragmentIdentifier(toLocalFrame(frame)->document()->url(), url)) {
             if (foundSelfReference)
                 return false;
             foundSelfReference = true;
         }
     }
@@ skipping 108 matching lines @@
     , m_textZoomFactor(parentTextZoomFactor(this))
     , m_inViewSourceMode(false)
 {
     if (isLocalRoot())
         m_instrumentingAgents = InstrumentingAgents::create();
     else
         m_instrumentingAgents = localFrameRoot()->m_instrumentingAgents;
 }
 
 } // namespace blink