Made Frame constructors (and subclasses) take Page& instead of Page*

third_party/WebKit/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>
@@ skipping 401 matching lines @@
   WebFeaturePolicy* featurePolicy = securityContext()->getFeaturePolicy();
   // The policy should always be initialized before checking it to ensure we
   // properly inherit the parent policy.
   DCHECK(featurePolicy);
 
   // Otherwise, check policy.
   return featurePolicy->IsFeatureEnabled(feature);
 }
 
 Frame::Frame(FrameClient* client,
-             Page* page,
+             Page& page,
              FrameOwner* owner,
              WindowProxyManager* windowProxyManager)
     : m_treeNode(this),
-      m_page(page),
+      m_page(&page),
       m_owner(owner),
       m_client(client),
       m_windowProxyManager(windowProxyManager),
       m_isLoading(false) {
   InstanceCounters::incrementCounter(InstanceCounters::FrameCounter);
 
-  DCHECK(m_page);
-
   if (m_owner)
     m_owner->setContentFrame(*this);
   else
     m_page->setMainFrame(this);
 }
 
 }  // namespace blink