RFR: 8373062: JFR build failure with CDS disabled [v3]

[Markus Grönlund]

> Greetings,
> 
> [JDK-8365400](https://bugs.openjdk.org/browse/JDK-8365400) caused a build problem when passing build option "--disable-cds" because of missing conditionals.
> 
> Testing: manually building with "--disable-cds"
> 
> Thanks
> Markus

Markus Grönlund has updated the pull request incrementally with one additional commit since the last revision:

  apa

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/28656/files
  - new: https://git.openjdk.org/jdk/pull/28656/files/369297f5..0e8612c7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28656&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28656&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/28656.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28656/head:pull/28656

PR: https://git.openjdk.org/jdk/pull/28656