RFR: 8336097: UserAgent Styles using lookups are promoted to Author level if look-up is defined in Author stylesheet [v2]

[John Hendrikx]

> This change removes the origin determination from `resolveLookups`.  Instead, the origin from the style is used.
> 
> Although a comment in the code alluded that this may cause problem with `INLINE` styles, this is not the case. Whenever a `Node` is associated with a `CssStyleHelper`, a suitable shared cache is determined for its use.  This already takes into account the presence of an inline style, and only nodes with the same inline style can share such a cache.  See `Cache#getStyleMap` and specifically this fragment where an additional selector is added for the inline style:
> 
>             if (hasInlineStyle) {
>                 Selector selector = cacheContainer.getInlineStyleSelector(inlineStyle);
>                 if (selector != null) selectors.add(selector);
>             }

John Hendrikx has updated the pull request incrementally with one additional commit since the last revision:

  Add test case

-------------

Changes:
  - all: https://git.openjdk.org/jfx/pull/1503/files
  - new: https://git.openjdk.org/jfx/pull/1503/files/8b989e83..73b910af

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1503&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1503&range=00-01

  Stats: 114 lines in 1 file changed: 103 ins; 7 del; 4 mod
  Patch: https://git.openjdk.org/jfx/pull/1503.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1503/head:pull/1503

PR: https://git.openjdk.org/jfx/pull/1503