diff -r 000000000000 -r 6474c204b198 dom/webidl/Event.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/Event.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,68 @@
+/* -*- Mode: IDL; 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/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(DOMString type, optional EventInit eventInitDict)]
+interface Event {
+  [Pure]
+  readonly attribute DOMString type;
+  [Pure]
+  readonly attribute EventTarget? target;
+  [Pure]
+  readonly attribute EventTarget? currentTarget;
+
+  const unsigned short NONE = 0;
+  const unsigned short CAPTURING_PHASE = 1;
+  const unsigned short AT_TARGET = 2;
+  const unsigned short BUBBLING_PHASE = 3;
+  [Pure]
+  readonly attribute unsigned short eventPhase;
+
+  void stopPropagation();
+  void stopImmediatePropagation();
+
+  [Pure]
+  readonly attribute boolean bubbles;
+  [Pure]
+  readonly attribute boolean cancelable;
+  void preventDefault();
+  [Pure]
+  readonly attribute boolean defaultPrevented;
+
+  [Unforgeable, Pure]
+  readonly attribute boolean isTrusted;
+  [Pure]
+  readonly attribute DOMTimeStamp timeStamp;
+
+  [Throws]
+  void initEvent(DOMString type, boolean bubbles, boolean cancelable);
+};
+
+// Mozilla specific legacy stuff.
+partial interface Event {
+  const long ALT_MASK     = 0x00000001;
+  const long CONTROL_MASK = 0x00000002;
+  const long SHIFT_MASK   = 0x00000004;
+  const long META_MASK    = 0x00000008;
+
+  readonly attribute EventTarget? originalTarget;
+  readonly attribute EventTarget? explicitOriginalTarget;
+  [ChromeOnly] readonly attribute boolean multipleActionsPrevented;
+  [ChromeOnly] readonly attribute boolean isSynthesized;
+
+  boolean getPreventDefault();
+};
+
+dictionary EventInit {
+  boolean bubbles = false;
+  boolean cancelable = false;
+};
+