Chrome Version: 62 canary
OS: All but iOS

What steps will reproduce the problem?
(1) Open the following URL:
    data:text/html;charset=utf-8,<div lang=ja style="font-size:50px;"><q>text</q><q lang="ko">text</q><q lang="&%23x212A;o">text</q></div>

What is the expected result?
The quotes for the first "text" and the third "text" should be identical.

What happens instead?
The quotes for the second "text" and the third "text" are identical.

Please use labels and text to provide additional information.
Firefox and Safari work expectedly.

DeprecatedLower() in QuotesDataForLanguage() should be LowerASCII().