Allow assertions to be enabled in Blink Release builds.

Source/core/dom/ContainerNode.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2013 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 42 matching lines @@
 #include "core/rendering/RenderView.h"
 #include "platform/ScriptForbiddenScope.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 static void dispatchChildInsertionEvents(Node&);
 static void dispatchChildRemovalEvents(Node&);
 
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
 unsigned NoEventDispatchAssertion::s_count = 0;
 #endif
 
 static void collectChildrenAndRemoveFromOldParent(Node& node, NodeVector& nodes, ExceptionState& exceptionState)
 {
     if (!node.isDocumentFragment()) {
         nodes.append(&node);
         if (ContainerNode* oldParent = node.parentNode())
             oldParent->removeChild(&node, exceptionState);
         return;
@@ skipping 1296 matching lines @@
     }
 
     // Fall back to traversing our subtree. In case of duplicate ids, the first element found will be returned.
     for (Element* element = ElementTraversal::firstWithin(*this); element; element = ElementTraversal::next(*element, this)) {
         if (element->getIdAttribute() == id)
             return element;
     }
     return 0;
 }
 
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
 bool childAttachedAllowedWhenAttachingChildren(ContainerNode* node)
 {
     if (node->isShadowRoot())
         return true;
 
     if (node->isInsertionPoint())
         return true;
 
     if (node->isElementNode() && toElement(node)->shadow())
         return true;
 
     return false;
 }
 #endif
 
 } // namespace WebCore