UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.37 Safari/537.36

Steps to reproduce the problem:
1. Change any of the font settings in chrome://settings/fonts
2. Hit "reset" button in the settings.

What is the expected behavior?
The font settings should be reset.

What went wrong?
The font settings are not reset.

The only way you can reset it is go to the preference file and manually remove the "webkit":{"webprefs":{"fonts":{"sansserif":{"font_name"}},"uses_universal_detector":true}} part.

Did this work before? N/A 

Chrome version: 57.0.2987.37  Channel: beta
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: Shockwave Flash 24.0 r0

Worth noting that even though user *can* manually change the fonts to default values, surely. But there is a big difference: if you never changed your font setting, it will automatically change when changing display language. 

For example, if you're using English interface, the default sans-serif font is Arial. If you never changed it, and now you changed your interface language to Simplified Chinese, this setting (sans-serif font) will automatically changed to "SimSun (宋体)". But if you EVER changed that setting before, even if you changed it back to Arial, it will NOT change any more among your interface language. 

So an ability to reset font settings are important.

It was reported in  issue 584400  but wrongly marked as duplicate.