OS: Linux

What steps will reproduce the problem?
(1) Visit any website
(2) Go to site details
(3) On the left side, see no setting names or icons 

I bisected down to this range:
https://chromium.googlesource.com/chromium/src/+log/62f2f8f209a82db0dd5a311eb4f844bddb75c98e..631a939b2b9a02a05cd1db367c7ea7fb17d14f50

Suspecting:
https://chromium.googlesource.com/chromium/src/+/177774d57a744b75630cba5507c3bf1ed419aea3
WebUI: Enable WebUIPolymer2 flag by default on Desktop.

dpapad: Can you take a look?
cc patricialor for site details