[webkit-dev] New feature flag: ENABLE_CSS_POSITION_STICKY

[Simon Fraser]

We intend to work on an experimental implementation of a  new CSS position type that we're calling "sticky", as proposed here:
<http://lists.w3.org/Archives/Public/www-style/2012Jun/0627.html>

This will be done behind a ENABLE_CSS_POSITION_STICKY flag. This flag will be used to hide the implementation from the web (but not necessarily compile out all the relevant code).

The bug is: https://bugs.webkit.org/show_bug.cgi?id=90046

Simon