Fix DeviceChangeEventInit WebIDL definition

getusermedia.html

@@ -3471,7 +3471,7 @@ <h2>Attributes</h2>
       <div>
         <pre class="idl"
 >dictionary DeviceChangeEventInit : EventInit {
-  sequence&lt;MediaStream&gt; streams = [];
+  sequence&lt;MediaDeviceInfo&gt; devices = [];
 };</pre>
         <section>
           <h2>Dictionary <dfn>DeviceChangeEventInit</dfn> Members</h2>