diff -r 000000000000 -r 6474c204b198 content/base/src/nsNodeInfo.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/base/src/nsNodeInfo.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,103 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Class that represents a prefix/namespace/localName triple; a single
+ * nodeinfo is shared by all elements in a document that have that
+ * prefix, namespace, and localName.
+ */
+
+#ifndef nsNodeInfo_h___
+#define nsNodeInfo_h___
+
+#include "mozilla/Attributes.h"
+#include "nsINodeInfo.h"
+#include "nsNodeInfoManager.h"
+#include "plhash.h"
+#include "nsIAtom.h"
+#include "nsCOMPtr.h"
+#include "nsIDOMNode.h"
+#include "nsGkAtoms.h"
+
+class nsNodeInfo : public nsINodeInfo
+{
+public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SKIPPABLE_CLASS(nsNodeInfo)
+
+  // nsINodeInfo
+  virtual void GetNamespaceURI(nsAString& aNameSpaceURI) const;
+  virtual bool NamespaceEquals(const nsAString& aNamespaceURI) const MOZ_OVERRIDE;
+
+  // nsNodeInfo
+public:
+  /*
+   * aName and aOwnerManager may not be null.
+   */
+  nsNodeInfo(nsIAtom *aName, nsIAtom *aPrefix, int32_t aNamespaceID,
+             uint16_t aNodeType, nsIAtom *aExtraName,
+             nsNodeInfoManager *aOwnerManager);
+
+private:
+  nsNodeInfo(); // Unimplemented
+  nsNodeInfo(const nsNodeInfo& aOther); // Unimplemented
+protected:
+  virtual ~nsNodeInfo();
+
+public:
+  bool CanSkip();
+
+private:
+  /**
+   * This method gets called by Release() when it's time to delete
+   * this object.
+   */
+  void LastRelease();
+};
+
+inline void
+CheckValidNodeInfo(uint16_t aNodeType, nsIAtom *aName, int32_t aNamespaceID,
+                   nsIAtom* aExtraName)
+{
+  NS_ABORT_IF_FALSE(aNodeType == nsIDOMNode::ELEMENT_NODE ||
+                    aNodeType == nsIDOMNode::ATTRIBUTE_NODE ||
+                    aNodeType == nsIDOMNode::TEXT_NODE ||
+                    aNodeType == nsIDOMNode::CDATA_SECTION_NODE ||
+                    aNodeType == nsIDOMNode::PROCESSING_INSTRUCTION_NODE ||
+                    aNodeType == nsIDOMNode::COMMENT_NODE ||
+                    aNodeType == nsIDOMNode::DOCUMENT_NODE ||
+                    aNodeType == nsIDOMNode::DOCUMENT_TYPE_NODE ||
+                    aNodeType == nsIDOMNode::DOCUMENT_FRAGMENT_NODE ||
+                    aNodeType == UINT16_MAX,
+                    "Invalid nodeType");
+  NS_ABORT_IF_FALSE((aNodeType == nsIDOMNode::PROCESSING_INSTRUCTION_NODE ||
+                     aNodeType == nsIDOMNode::DOCUMENT_TYPE_NODE) ==
+                    !!aExtraName,
+                    "Supply aExtraName for and only for PIs and doctypes");
+  NS_ABORT_IF_FALSE(aNodeType == nsIDOMNode::ELEMENT_NODE ||
+                    aNodeType == nsIDOMNode::ATTRIBUTE_NODE ||
+                    aNodeType == UINT16_MAX ||
+                    aNamespaceID == kNameSpaceID_None,
+                    "Only attributes and elements can be in a namespace");
+  NS_ABORT_IF_FALSE(aName && aName != nsGkAtoms::_empty, "Invalid localName");
+  NS_ABORT_IF_FALSE(((aNodeType == nsIDOMNode::TEXT_NODE) ==
+                     (aName == nsGkAtoms::textTagName)) &&
+                    ((aNodeType == nsIDOMNode::CDATA_SECTION_NODE) ==
+                     (aName == nsGkAtoms::cdataTagName)) &&
+                    ((aNodeType == nsIDOMNode::COMMENT_NODE) ==
+                     (aName == nsGkAtoms::commentTagName)) &&
+                    ((aNodeType == nsIDOMNode::DOCUMENT_NODE) ==
+                     (aName == nsGkAtoms::documentNodeName)) &&
+                    ((aNodeType == nsIDOMNode::DOCUMENT_FRAGMENT_NODE) ==
+                     (aName == nsGkAtoms::documentFragmentNodeName)) &&
+                    ((aNodeType == nsIDOMNode::DOCUMENT_TYPE_NODE) ==
+                     (aName == nsGkAtoms::documentTypeNodeName)) &&
+                    ((aNodeType == nsIDOMNode::PROCESSING_INSTRUCTION_NODE) ==
+                     (aName == nsGkAtoms::processingInstructionTagName)),
+                    "Wrong localName for nodeType");
+}
+
+#endif /* nsNodeInfo_h___ */