Bug 1060541 - [Lockscreen] Adding 1 additional notification to lockscreen with new music player

I think it's clever to implement `_.range` in this way. However, it should not be a inner function with only generator. IMO there should be a function named `range`, and implement like:

    // (Number, Number) -> [Number]
    var range = (from, to) => {
      var rangeGenerator = ...
      return Array.from(rangeGenerator);
    }