RFR: 8313394: Array Elements in OldObjectSample event should be -1 if the object is not an array [v2]

[KIRIYAMA Takuya]

> With this fix, arrayElements attribute in OldObjectSample event will be -1 if the object is not an array.  
> Could anyone please review this fix?

KIRIYAMA Takuya has updated the pull request incrementally with one additional commit since the last revision:

  8313394: Array Elements in OldObjectSample event should be -1 if the object is not an array

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15084/files
  - new: https://git.openjdk.org/jdk/pull/15084/files/7e584ed8..6a61e62c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15084&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15084&range=00-01

  Stats: 109 lines in 3 files changed: 0 ins; 107 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/15084.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15084/head:pull/15084

PR: https://git.openjdk.org/jdk/pull/15084