Failed to construct 'URL' error on Chrome 53

[earllevine]

This error only appears on Chrome version 53 (released in the last few days), but not on older versions of Chrome nor other browsers:
Uncaught TypeError: Failed to construct 'URL': Please use the 'new' operator, this DOM object constructor cannot be called as a function.

You can see this error for example by visiting https://afarkas.github.io/webshim/demos/

[outdooricon]

See #576

[ahmadalfy]

Can confirm this is happening on 55.0.2868.3 (Official Build) dev (64-bit)

[mitchiru]

+1