Replace ASSERT family with DCHECK and so on in core/dom/.

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/dom/IntersectionObserver.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/css/parser/CSSParserTokenRange.h"
 #include "core/css/parser/CSSTokenizer.h"
 #include "core/dom/Element.h"
@@ skipping 209 matching lines @@
       m_rightMargin = m_leftMargin = rootMargin[1];
       m_bottomMargin = rootMargin[2];
       break;
     case 4:
       m_topMargin = rootMargin[0];
       m_rightMargin = rootMargin[1];
       m_bottomMargin = rootMargin[2];
       m_leftMargin = rootMargin[3];
       break;
     default:
-      ASSERT_NOT_REACHED();
+      NOTREACHED();
       break;
   }
   root.document().ensureIntersectionObserverController().addTrackedObserver(
       *this);
 }
 
 void IntersectionObserver::clearWeakMembers(Visitor* visitor) {
   if (ThreadHeap::isHeapObjectAlive(m_root))
     return;
   IgnorableExceptionState exceptionState;
@@ skipping 195 matching lines @@
 
 DEFINE_TRACE(IntersectionObserver) {
   visitor->template registerWeakMembers<
       IntersectionObserver, &IntersectionObserver::clearWeakMembers>(this);
   visitor->trace(m_callback);
   visitor->trace(m_observations);
   visitor->trace(m_entries);
 }
 
 }  // namespace blink