RFR: JDK-8286666: JEP 429: Implementation of Scoped Values (Incubator) [v14]

[Andrew Haley]

> JEP 429 implementation.

Andrew Haley has updated the pull request incrementally with two additional commits since the last revision:

 - Merge branch 'JDK-8286666' of https://github.com/theRealAph/jdk into JDK-8286666
 - Reviewer feedback

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10952/files
  - new: https://git.openjdk.org/jdk/pull/10952/files/cac85ad0..6de9a4cc

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10952&range=13
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10952&range=12-13

  Stats: 27 lines in 2 files changed: 9 ins; 13 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/10952.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10952/head:pull/10952

PR: https://git.openjdk.org/jdk/pull/10952