Remove listeners will not actually remove listeners

[k88hudson]

I just noticed right now in ActivityStreams we have:

  _setupListeners() {
    PlacesProvider.links.on("deleteURI", this._handlePlacesChanges.bind(this));
    ...

  _removeListeners() {
    PlacesProvider.links.on("deleteURI", this._handlePlacesChanges);
    ...

I think this.fn !== this.fn.bind(this), so we'll need to use a different strategy for this

[oyiptong]

You are correct.

event-emitter.js uses a Map to hold the listeners: https://dxr.mozilla.org/mozilla-central/source/devtools/shared/event-emitter.js#65

Also, this.fn.bind(this) !=== this.fn.bind(this)

[rlr]

landed