Tests for ShadowAware JS APIs.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


PASS root1 is not root2
PASS root1 is window.internals.oldestShadowRoot(host)
PASS root2 is window.internals.youngestShadowRoot(host)
PASS successfullyParsed is true

TEST COMPLETE