Chrome Version: 56.0.2924.87
OS: Android

What steps will reproduce the problem?
(1) Go to Settings -> Accessibility and drag "Test scaling" slider to the rightmost position (200%).
(2) Open "https://en.m.wikipedia.org/wiki/Accessibility".

What is the expected result?

Main article text is scaled up compared to its original font size.

What happens instead?

Main article text remains at its original font size.

As "Text scaling" is an accessibility setting, it may be used by people with impaired vision who need larger font sizes to be able to read the text.

Inspecting the page reveals that Wikipedia uses "-webkit-text-size-adjust: none;" for its main text (which is why the text size doesn't change in Chromium), but according to the spec https://drafts.csswg.org/css-size-adjust/ , the text size adjustment feature is intended to improve readability of certain categories of text elements on small mobile screens, not to enable text magnification for visually impaired people (which Accessibility settings category suggests).

Using "Large text" setting in Android system accessibility settings also doesn't work, the main article text on Wikipedia remains the same size.

The current behavior was introduced in https://codereview.chromium.org/2514733005 , previously the text on Wikipedia was scaled according to the setting.