Bug 1010104 - [Dialer][Call Screen] Baseline of the contact name when applying the fluid font size

Oh, you were referring to the 259 line (I think :O) not to the whole block of code selected in the comment :)
I hope you mean something like:
'''javascript
FontSizeManager.adaptToSpace(
      scenario, this.numberNode, this.node.querySelector('.fake-number'),
      false, ellipsisSide);
'''