Alexander Marks f2ea80c413 Return ClassInfo instead of a DirectiveResult from mwc-button's getRenderClasses() method.
1. It allows subclasses to augment the classes.
2. It avoids an issue relating to relying on the implied type of Directive results, due to a bug in tsc (see https://github.com/material-components/material-web/issues/2715 and https://github.com/microsoft/TypeScript/issues/45946)

PiperOrigin-RevId: 397790019
2021-09-20 10:52:19 -07:00
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2021-09-13 16:29:20 -07:00