Bug 836654 - Part 8: Inform the mozbrowser embedder when we're opening a frame that we expect to send a system message to. r=cjones

b2g/chrome/content/shell.js

@@ -526,7 +526,8 @@ var shell = {
       url: msg.uri,
       manifestURL: msg.manifest,
       isActivity: (msg.type == 'activity'),
-      target: msg.target
+      target: msg.target,
+      expectingSystemMessage: true
     });
   },