Remove support for applyAuthorStyles/resetStyleInheritance

[ebidel]

These properties are supported on Polymer(), but they're going away.

[ebidel]

applyAuthorStyles was removed in googlearchive/polymer-dev@67ac33e.

resetStyleInheritance is being kept around for awhile longer in native SD because some customers were using it. We'll eventually need to remove. Closing for now.

[addyosmani]

I assume now would be a good time to also drop all refs to them in any boilerplate/tutorials we've put together in the past?

[ebidel]

Yes, please. aAS was removed form the polymer docs and h5r articles.

[roydukkey]

Why was this removed? Is there an alternate way to stop parent document styles from bleeding into web components?

[ebidel]

The spec discussion is here: https://www.w3.org/Bugs/Public/show_bug.cgi?id=23625

By default, Shadow DOM prevents parent document styles from bleeding into components. applyAuthorAuthor styles is the opposite. It allowed them in. The replacement for resetStyleInheritance is CSS all (https://developer.mozilla.org/en-US/docs/Web/CSS/all). That's not implemented yet in Chrome.

[roydukkey]

Humm. Okay. I don't know if this is expected, but html { color: red; } is applied to Shadow DOM. This was my original test and I noticed this wasn't functioning as I expected. Thanks!

[ebidel]

color is an inheritable property