Privacy Review of CSS Cascading and Inheritance Level 3

Since CSS Cascading and Inheritance Level 3 entered CR more than 2 years ago 
(in 2015), the Director has asked for a re-review by all HRGs prior to 
transitioning to PR. Thus, the CSSWG requests formal review of css-cascade-3.

Cascading and Inheritance describes how the UA collates CSS style rules and 
assigns values to all properties on all elements. See
   https://www.w3.org/TR/css-cascade-3/

The new features added by this specification (since CSS2) are listed in
   https://www.w3.org/TR/css-cascade-3/#changes-2
and consist solely of:
   * the 'all' shorthand
       https://www.w3.org/TR/css-cascade-3/#all-shorthand
   * the 'initial' keyword
       https://www.w3.org/TR/css-cascade-3/#initial
   * the 'unset' keyword
       https://www.w3.org/TR/css-cascade-3/#inherit-initial
   * incorporation of animations and transitions into the cascade
       https://www.w3.org/TR/css-cascade-3/#cascade-sort

The implementation report is here:
   https://drafts.csswg.org/css-cascade-3/implementation-report

The Privacy and Security Considerations section is here:
   https://www.w3.org/TR/css-cascade-3/#priv-sec

Please file any specific issues in https://github.com/w3c/csswg-drafts/issues
and if there are none, please explicitly indicate completion of the review.

Thanks~
~fantasai