Implement contextmenu attribute with basic support of <menu>

Source/core/html/HTMLMenuitemElement.idl

Index: Source/core/html/HTMLMenuitemElement.idl
diff --git a/Source/core/html/HTMLMenuitemElement.idl b/Source/core/html/HTMLMenuitemElement.idl
new file mode 100644
index 0000000000000000000000000000000000000000..12af9479696a1ad9b64248d3d4eb649b08f41034
--- /dev/null
+++ b/Source/core/html/HTMLMenuitemElement.idl
@@ -0,0 +1,11 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+interface HTMLMenuitemElement : HTMLElement {

[esprehn, 2014/06/20 08:39:57]

This is not spelled correctly, the spec says the I is capitalized:
HTMLMenuItemElement

[pals, 2014/06/20 14:22:10]

Done.

+    [Reflect] readonly attribute DOMString type;
+    [Reflect] readonly attribute DOMString label;
+    [Reflect] readonly attribute boolean disabled;
+    [Reflect] readonly attribute boolean checked;
+    [Reflect] readonly attribute boolean default;
+};