Replace ASSERT()s with DCHECK*() in core/html/*.{cpp,h}.

third_party/WebKit/Source/core/html/HTMLMapElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 46 matching lines @@
             return &area;
     }
 
     return defaultArea;
 }
 
 HTMLImageElement* HTMLMapElement::imageElement()
 {
     HTMLCollection* images = document().images();
     for (unsigned i = 0; Element* curr = images->item(i); ++i) {
-        ASSERT(isHTMLImageElement(curr));
+        DCHECK(isHTMLImageElement(curr));
 
         // The HTMLImageElement's useMap() value includes the '#' symbol at the beginning,
         // which has to be stripped off.
         HTMLImageElement& imageElement = toHTMLImageElement(*curr);
         String useMapName = imageElement.getAttribute(usemapAttr).getString().substring(1);
         if (equalIgnoringCase(useMapName, m_name))
             return &imageElement;
     }
 
     return nullptr;
@@ skipping 39 matching lines @@
 }
 
 void HTMLMapElement::removedFrom(ContainerNode* insertionPoint)
 {
     if (insertionPoint->isConnected())
         treeScope().removeImageMap(this);
     HTMLElement::removedFrom(insertionPoint);
 }
 
 } // namespace blink