[Extensions Bindings] Introduce a supportsLazyListeners property

extensions/renderer/resources/messaging.js

Index: extensions/renderer/resources/messaging.js
diff --git a/extensions/renderer/resources/messaging.js b/extensions/renderer/resources/messaging.js
index f44d753d4e9b4466d65a073edf2da51b3475771d..bfca99233df9ab61a12ffbb84986778eb8003df7 100644
--- a/extensions/renderer/resources/messaging.js
+++ b/extensions/renderer/resources/messaging.js
@@ -25,10 +25,12 @@
   var jsEvent;
   function createAnonymousEvent(schema) {
     if (bindingUtil) {
-      // Native custom events ignore schema.
       var supportsFilters = false;
+      var supportsLazyListeners = false;

[lazyboy, 2017/07/14 00:04:42]

Do we need true here?

[Devlin, 2017/07/14 15:37:54]

Nope, see previous comment.

[lazyboy, 2017/07/17 23:38:50]

Acknowledged.

+      // Native custom events ignore schema.
       return bindingUtil.createCustomEvent(undefined, undefined,
-                                           supportsFilters);
+                                           supportsFilters,
+                                           supportsLazyListeners);
     }
     var options = {
       __proto__: null,