RFR: JDK-8286666: JEP 429: Implementation of Scoped Values (Incubator) [v15]

[Andrew Haley]

> JEP 429 implementation.

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

 - Reviewer feedback
 - Reviewer feedback Javadoc fixes

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Changes:
  - all: https://git.openjdk.org/jdk/pull/10952/files
  - new: https://git.openjdk.org/jdk/pull/10952/files/6de9a4cc..17c458fa

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10952&range=14
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10952&range=13-14

  Stats: 20 lines in 2 files changed: 3 ins; 4 del; 13 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