this.fire breaking in Polymer 2.0-preview branch

[BhautikDoshi]

We just started the migration to 2.0 after rc2. Want to move completely to 2.0 as we are in early stage.

For app-localize-behavior not sure what is the best way to use in 2.0. Found #70 but that code was not fixed. Will this be available as class expression at some point or any other alternative?. For now we have a hack to just keep instance of app-localize-behavior and redirect localize method to it. And we ran in to following issue:

Could we get a fix for this.fire in following code for 2.0 branch.

  __onRequestResponse: function(event) {
    this.resources = event.response;
    this.fire('app-localize-resources-loaded');
  },

  __onRequestError: function(event) {
    this.fire('app-localize-resources-error');
  }

Error:

Thanks.

[BhautikDoshi]

we figured this out from:
https://www.polymer-project.org/2.0/toolbox/localize