Use Node.isDocumentTypeNode more

Source/core/dom/Node.h

Index: Source/core/dom/Node.h
diff --git a/Source/core/dom/Node.h b/Source/core/dom/Node.h
index eb624080bcc0474bae979c998d9415a4e456c571..e929ed7be65aff1ee16c31db7438f730a6ca405e 100644
--- a/Source/core/dom/Node.h
+++ b/Source/core/dom/Node.h
@@ -473,7 +473,6 @@ public:
     bool isInShadowTree() const { return getFlag(IsInShadowTreeFlag); }
     bool isInTreeScope() const { return getFlag(static_cast<NodeFlags>(InDocumentFlag | IsInShadowTreeFlag)); }
 
-    bool isDocumentTypeNode() const { return nodeType() == DOCUMENT_TYPE_NODE; }

[Inactive, 2014/01/24 20:14:50]

Hmm. It could actually be used in:
- Source/core/dom/Range.cpp:        if (n->nodeType() ==
Node::DOCUMENT_TYPE_NODE) {
- Source/core/editing/markup.cpp:    if (nodeType != Node::DOCUMENT_NODE &&
nodeType != Node::DOCUMENT_TYPE_NODE)
- Source/core/dom/DocumentType.h:DEFINE_NODE_TYPE_CASTS(DocumentType, nodeType()
== Node::DOCUMENT_TYPE_NODE);

And would lead to slightly more readable code.

     virtual bool childTypeAllowed(NodeType) const { return false; }
     unsigned childNodeCount() const;
     Node* childNode(unsigned index) const;