[ShadyCSS] For shady-unscoped styles, create style fresh (#242)
[ShadyCSS] For shady-unscoped styles, create style fresh (#242)

There is some weird edge-case bug in Edge where a cloned style does not
apply correctly to the page.

An easy workaround is to just create a new style and set the
textContent.

Fixes internal bug http://b/146331642
webcomponents/polyfills,webcomponents/polyfills,webcomponents/polyfills