Updated to Chrome 45 (2454) moved from SVN to git.

core/frame/WindowEventHandlers.idl

 /*
  * Copyright (c) 2013, Opera Software ASA. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the name of Opera Software ASA nor the names of its
  *    contributors may be used to endorse or promote products derived
  *    from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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-// http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#windoweventhandlers
+// https://html.spec.whatwg.org/multipage/webappapis.html#windoweventhandlers
 
 [
     ImplementedAs=DOMWindowEventHandlers,
     LegacyTreatAsPartialInterface,
     NoInterfaceObject, // Always used on target of 'implements'
 ] interface WindowEventHandlers {
     //attribute EventHandler onafterprint;
     //attribute EventHandler onbeforeprint;
+    // FIXME: onbeforeunload should be an OnBeforeUnloadEventHandler.
     attribute EventHandler onbeforeunload;
     attribute EventHandler onhashchange;
     attribute EventHandler onlanguagechange;
     attribute EventHandler onmessage;
     attribute EventHandler onoffline;
     attribute EventHandler ononline;
     attribute EventHandler onpagehide;
     attribute EventHandler onpageshow;
     attribute EventHandler onpopstate;
     attribute EventHandler onstorage;
     attribute EventHandler onunload;
+
+    // Unhandled Promise Rejection Events
+    // https://github.com/domenic/unhandled-rejections-browser-spec
+    [RuntimeEnabled=PromiseRejectionEvent] attribute EventHandler onrejectionhandled;
+    [RuntimeEnabled=PromiseRejectionEvent] attribute EventHandler onunhandledrejection;
 };