If an event listener callback throws, report the exception (window.on…

…error): https://www.w3.org/Bugs/Public/show_bug.cgi?id=17713

Overview.src.html

@@ -1086,7 +1086,8 @@ <h3>Dispatching events</h3>
    <code title=dom-EventListener-handleEvent>handleEvent</code>, with the event passed to
    this algorithm as the first argument and <var title>event</var>'s
    <code title=dom-Event-currentTarget>currentTarget</code> attribute value as
-   <span data-anolis-spec=webidl>callback this value</span>.
+   <span data-anolis-spec=webidl>callback this value</span>. If this throws any exception,
+   <span data-anolis-spec=html>report the exception</span>.
   </ol>
  </li>
 </ol>

dom-core.html

@@ -9,7 +9,7 @@
 
 <hgroup>
  <h1 class="allcaps">DOM</h1>
- <h2>Living Standard — Last Updated 25 November 2014</h2>
+ <h2>Living Standard — Last Updated 26 November 2014</h2>
 </hgroup>
 
 <dl>
@@ -1166,7 +1166,8 @@ <h3 id="dispatching-events"><span class="secno">3.7 </span>Dispatching events</h
    <code title="dom-EventListener-handleEvent">handleEvent</code>, with the event passed to
    this algorithm as the first argument and <var title="">event</var>'s
    <code title="dom-Event-currentTarget"><a href="#dom-event-currenttarget">currentTarget</a></code> attribute value as
-   <a class="external" data-anolis-spec="webidl" href="http://heycam.github.io/webidl/#dfn-callback-this-value">callback this value</a>.
+   <a class="external" data-anolis-spec="webidl" href="http://heycam.github.io/webidl/#dfn-callback-this-value">callback this value</a>. If this throws any exception,
+   <a class="external" data-anolis-spec="html" href="https://html.spec.whatwg.org/multipage/webappapis.html#report-the-exception">report the exception</a>.
   </ol>
  </li>
 </ol>