Deferred frame loading stats v2

third_party/WebKit/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>
@@ skipping 520 matching lines @@
 LocalFrame* LocalFrame::localFrameRoot() {
   LocalFrame* curFrame = this;
   while (curFrame && curFrame->tree().parent() &&
          curFrame->tree().parent()->isLocalFrame())
     curFrame = toLocalFrame(curFrame->tree().parent());
 
   return curFrame;
 }
 
 bool LocalFrame::isCrossOriginSubframe() const {
+  DCHECK(securityContext());
   const SecurityOrigin* securityOrigin = securityContext()->getSecurityOrigin();
   Frame* top = tree().top();
   return top &&
          !securityOrigin->canAccess(
              top->securityContext()->getSecurityOrigin());
 }
 
 void LocalFrame::setPrinting(bool printing,
                              const FloatSize& pageSize,
                              const FloatSize& originalPageSize,
@@ skipping 349 matching lines @@
   if (m_frame && m_frame->client() && m_frame->client()->frameBlameContext())
     m_frame->client()->frameBlameContext()->Enter();
 }
 
 ScopedFrameBlamer::~ScopedFrameBlamer() {
   if (m_frame && m_frame->client() && m_frame->client()->frameBlameContext())
     m_frame->client()->frameBlameContext()->Leave();
 }
 
 }  // namespace blink