Merge pull request #41 from autokagami/mediacapture-handle-actions

[mediacapture-handle-actions] Align with Web IDL specification

Author: dontcallmedom

actions/index.html

@@ -188,7 +188,7 @@ <h4><dfn>CaptureActionEvent</dfn></h4>
             <pre class="idl">
               [Exposed=Window]
               interface CaptureActionEvent : Event {
-                constructor(CaptureActionEventInit init);
+                constructor(optional CaptureActionEventInit init = {});
                 readonly attribute CaptureAction action;
               };
             </pre>