Have HTMLFrameOwnerElement / SubframeLoadingDisabler deal with references

Source/core/frame/Frame.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 106 matching lines @@
     , m_textZoomFactor(parentTextZoomFactor(this))
 #if ENABLE(ORIENTATION_EVENTS)
     , m_orientation(0)
 #endif
     , m_inViewSourceMode(false)
 {
     ASSERT(page);
 
     if (ownerElement) {
         page->incrementSubframeCount();
-        ownerElement->setContentFrame(this);
+        ownerElement->setContentFrame(*this);
     }
 
 #ifndef NDEBUG
     frameCounter.increment();
 #endif
 }
 
 PassRefPtr<Frame> Frame::create(Page* page, HTMLFrameOwnerElement* ownerElement, FrameLoaderClient* client)
 {
     RefPtr<Frame> frame = adoptRef(new Frame(page, ownerElement, client));
@@ skipping 539 matching lines @@
     if (!m_page)
         return 0;
 
     double ratio = m_page->deviceScaleFactor();
     if (RuntimeEnabledFeatures::devicePixelRatioIncludesZoomEnabled())
         ratio *= pageZoomFactor();
     return ratio;
 }
 
 } // namespace WebCore