diff -r 000000000000 -r 6474c204b198 content/base/src/Comment.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/base/src/Comment.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,81 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#ifndef mozilla_dom_Comment_h
+#define mozilla_dom_Comment_h
+
+#include "mozilla/Attributes.h"
+#include "nsIDOMComment.h"
+#include "nsGenericDOMDataNode.h"
+
+namespace mozilla {
+namespace dom {
+
+class Comment MOZ_FINAL : public nsGenericDOMDataNode,
+                          public nsIDOMComment
+{
+private:
+  void Init()
+  {
+    NS_ABORT_IF_FALSE(mNodeInfo->NodeType() == nsIDOMNode::COMMENT_NODE,
+                      "Bad NodeType in aNodeInfo");
+  }
+
+public:
+  Comment(already_AddRefed<nsINodeInfo>&& aNodeInfo)
+    : nsGenericDOMDataNode(aNodeInfo)
+  {
+    Init();
+  }
+
+  Comment(nsNodeInfoManager* aNodeInfoManager)
+    : nsGenericDOMDataNode(aNodeInfoManager->GetCommentNodeInfo())
+  {
+    Init();
+  }
+
+  virtual ~Comment();
+
+  // nsISupports
+  NS_DECL_ISUPPORTS_INHERITED
+
+  // nsIDOMNode
+  NS_FORWARD_NSIDOMNODE_TO_NSINODE
+
+  // nsIDOMCharacterData
+  NS_FORWARD_NSIDOMCHARACTERDATA(nsGenericDOMDataNode::)
+  using nsGenericDOMDataNode::SetData; // Prevent hiding overloaded virtual function.
+
+  // nsIDOMComment
+  // Empty interface
+
+  // nsINode
+  virtual bool IsNodeOfType(uint32_t aFlags) const;
+
+  virtual nsGenericDOMDataNode* CloneDataNode(nsINodeInfo *aNodeInfo,
+                                              bool aCloneText) const MOZ_OVERRIDE;
+
+  virtual nsIDOMNode* AsDOMNode() MOZ_OVERRIDE { return this; }
+#ifdef DEBUG
+  virtual void List(FILE* out, int32_t aIndent) const MOZ_OVERRIDE;
+  virtual void DumpContent(FILE* out = stdout, int32_t aIndent = 0,
+                           bool aDumpAll = true) const MOZ_OVERRIDE
+  {
+    return;
+  }
+#endif
+
+  static already_AddRefed<Comment>
+  Constructor(const GlobalObject& aGlobal, const nsAString& aData,
+              ErrorResult& aRv);
+
+protected:
+  virtual JSObject* WrapNode(JSContext *aCx) MOZ_OVERRIDE;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_Comment_h