Use Node.isDocumentTypeNode more

Source/core/inspector/InspectorDOMAgent.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 1504 matching lines @@
                 forcePushChildren = true;
             }
             break;
         }
         }
     } else if (node->isDocumentNode()) {
         Document* document = toDocument(node);
         value->setDocumentURL(documentURLString(document));
         value->setBaseURL(documentBaseURLString(document));
         value->setXmlVersion(document->xmlVersion());
-    } else if (node->nodeType() == Node::DOCUMENT_TYPE_NODE) {
+    } else if (node->isDocumentTypeNode()) {
         DocumentType* docType = toDocumentType(node);
         value->setPublicId(docType->publicId());
         value->setSystemId(docType->systemId());
         value->setInternalSubset(docType->internalSubset());
     } else if (node->isAttributeNode()) {
         Attr* attribute = toAttr(node);
         value->setName(attribute->name());
         value->setValue(attribute->value());
     } else if (node->isShadowRoot()) {
         value->setShadowRootType(shadowRootType(toShadowRoot(node)));
@@ skipping 488 matching lines @@
     if (!m_documentNodeToIdMap.contains(m_document)) {
         RefPtr<TypeBuilder::DOM::Node> root;
         getDocument(errorString, root);
         return errorString->isEmpty();
     }
     return true;
 }
 
 } // namespace WebCore