Get neglected tests to pass in Chrome

[cratonica]

I was unable to get the tests to all pass in FireFox due to Polymer/polymer#4146, but this at-least gets them passing in Chrome.

This will give me some confidence that I didn't break anything after I run it through Modulizer.

[googlebot]

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[cratonica]

I'm a Googler, so I don't need to sign the CLA.

[googlebot]

CLAs look good, thanks!