Bind former arrow function in connection.js to this.

mojo/public/js/connection.js

Index: mojo/public/js/connection.js
diff --git a/mojo/public/js/connection.js b/mojo/public/js/connection.js
index 214f8077a7ed684347b6443b66db3df3ba107913..cdf99ce8c3da9107cb3542794ad4bc0e6bbe02aa 100644
--- a/mojo/public/js/connection.js
+++ b/mojo/public/js/connection.js
@@ -29,7 +29,7 @@ define("mojo/public/js/connection", [
       if (StubBindings(this.local) &&
           StubBindings(this.local).connectionErrorHandler)
         StubBindings(this.local).connectionErrorHandler();
-    });
+    }.bind(this));
     if (this.remote)
       this.remote.receiver_ = router;