Web Animations: Avoid player updates when compositor start time is set

Player updates were being forced following start time updates, this could cause
invalid lifecycle changes in some cases. By setting the player outdated this
can be avoided.

This is a reland of r171839[1]. Fixes in ChromeOS browser_tests were tested manually.

[1] https://src.chromium.org/viewvc/blink?view=rev&revision=171839

BUG=364250, 364250

Review URL: https://codereview.chromium.org/238353013

git-svn-id: svn://svn.chromium.org/blink/trunk@172742 bbb929c8-8fbe-4397-9dbb-9b2b20218538