RFR: 8269295: Verification time before/after young collection only covers parts of the verification [v2]

[Thomas Schatzl]

> Hi all,
> 
>   can I have reviews for this change that makes "Verify Before/After GC" contain all young collection time instead only a (large) part.
> 
> This change also removed some unnecessary and unused return values. They can certainly be re-added if necessary.
> 
> Testing: tier1
> 
> Thanks,
>   Thomas
> 
> Note: this depends on PR4586.

Thomas Schatzl has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4587/files
  - new: https://git.openjdk.java.net/jdk/pull/4587/files/7b4ce0e2..7b4ce0e2

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4587&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4587&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4587.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4587/head:pull/4587

PR: https://git.openjdk.java.net/jdk/pull/4587