RFR: 8341372: BackgroundPosition, BorderImage, BorderStroke, CornerRadii should be final [v2]

[Michael Strauß]

> Backgrounds and borders are comprised of immutable and final types. The following types are marked with the `final` modifier:
> 
> * Background
> * BackgroundFill
> * BackgroundImage
> * BackgroundSize
> * Border
> * BorderWidths
> 
> The following types are not marked with the `final` modifier:
> 
> * BackgroundPosition
> * BorderImage
> * BorderStroke
> * CornerRadii
> 
> This is probably just an oversight, as there is no value in allowing a subsection of these types to be extended.

Michael Strauß has updated the pull request incrementally with one additional commit since the last revision:

  make fields private

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

Changes:
  - all: https://git.openjdk.org/jfx/pull/1587/files
  - new: https://git.openjdk.org/jfx/pull/1587/files/13025a0c..659d7c93

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1587&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1587&range=00-01

  Stats: 76 lines in 11 files changed: 0 ins; 1 del; 75 mod
  Patch: https://git.openjdk.org/jfx/pull/1587.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1587/head:pull/1587

PR: https://git.openjdk.org/jfx/pull/1587