diff -r 000000000000 -r 6474c204b198 accessible/src/html/HTMLCanvasAccessible.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/accessible/src/html/HTMLCanvasAccessible.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,24 @@
+/* -*- 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/. */
+
+#include "HTMLCanvasAccessible.h"
+
+#include "Role.h"
+
+using namespace mozilla::a11y;
+
+HTMLCanvasAccessible::
+  HTMLCanvasAccessible(nsIContent* aContent, DocAccessible* aDoc) :
+  HyperTextAccessibleWrap(aContent, aDoc)
+{
+}
+
+NS_IMPL_ISUPPORTS_INHERITED0(HTMLCanvasAccessible, HyperTextAccessible)
+
+role
+HTMLCanvasAccessible::NativeRole()
+{
+  return roles::CANVAS;
+}