[Layout API] Use more layoutViewItem() in Document

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 480 matching lines @@
     // ignoring the defersLoading flag.
     DCHECK(!parentDocument() || !parentDocument()->activeDOMObjectsAreSuspended());
 
 #ifndef NDEBUG
     liveDocumentSet().add(this);
 #endif
 }
 
 Document::~Document()
 {
-    DCHECK(!layoutView());
+    DCHECK(layoutViewItem().isNull());
     DCHECK(!parentTreeScope());
     // If a top document with a cache, verify that it was comprehensively
     // cleared during detach.
     DCHECK(!m_axObjectCache);
     InstanceCounters::decrementCounter(InstanceCounters::DocumentCounter);
 }
 
 SelectorQueryCache& Document::selectorQueryCache()
 {
     if (!m_selectorQueryCache)
@@ skipping 2633 matching lines @@
             // because they need to be contained in iframes with the srcdoc.
             DCHECK(frame);
         }
         referrerDocument = frame->document();
     }
     return referrerDocument->m_url.strippedForUseAsReferrer();
 }
 
 MouseEventWithHitTestResults Document::prepareMouseEvent(const HitTestRequest& request, const LayoutPoint& documentPoint, const PlatformMouseEvent& event)
 {
-    DCHECK(!layoutView() || layoutView()->isLayoutView());
+    DCHECK(layoutViewItem().isNull() || layoutViewItem().isLayoutView());
 
     // LayoutView::hitTest causes a layout, and we don't want to hit that until the first
     // layout because until then, there is nothing shown on the screen - the user can't
     // have intentionally clicked on something belonging to this page. Furthermore,
     // mousemove events before the first layout should not lead to a premature layout()
     // happening, which could show a flash of white.
     // See also the similar code in EventHandler::hitTestResultAtPoint.
     if (layoutViewItem().isNull() || !view() || !view()->didFirstLayout())
         return MouseEventWithHitTestResults(event, HitTestResult(request, LayoutPoint()));
 
@@ skipping 2853 matching lines @@
 }
 
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().getString().utf8().data());
 }
 #endif