RFR: 8326606: Test javax/swing/text/BoxView/6494356/bug6494356.java performs a synchronization on a value based class [v2]

[Prasanta Sadhukhan]

> OPensource BoxView test

Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:

  Review comment update

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18147/files
  - new: https://git.openjdk.org/jdk/pull/18147/files/f3e6d0a8..43b05813

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18147&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18147&range=00-01

  Stats: 7 lines in 1 file changed: 3 ins; 4 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/18147.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18147/head:pull/18147

PR: https://git.openjdk.org/jdk/pull/18147