Assert that continuations be either LayoutBlockFlow or LayoutInline.

third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 902 matching lines @@
 }
 
 LayoutBoxModelObject* LayoutBoxModelObject::continuation() const
 {
     return (!continuationMap) ? nullptr : continuationMap->get(this);
 }
 
 void LayoutBoxModelObject::setContinuation(LayoutBoxModelObject* continuation)
 {
     if (continuation) {
+        ASSERT(continuation->isLayoutInline() || continuation->isLayoutBlockFlow());
         if (!continuationMap)
             continuationMap = new ContinuationMap;
         continuationMap->set(this, continuation);
     } else {
         if (continuationMap)
             continuationMap->remove(this);
     }
 }
 
 void LayoutBoxModelObject::computeLayerHitTestRects(LayerHitTestRects& rects) const
@@ skipping 201 matching lines @@
     if (rootElementStyle->hasBackground())
         return false;
 
     if (node() != document().firstBodyElement())
         return false;
 
     return true;
 }
 
 } // namespace blink