RFR: 8255213: Shenandoah build fails without JFR after JDK-8255036 [v3]

[Jie Fu]

> Hi all,
> 
> Please review the one-line fix of Shenandoah build failure without JFR.
> 
> Thanks.
> Best regards,
> Jie

Jie Fu has updated the pull request incrementally with one additional commit since the last revision:

  Fix build error without PCH and JFR

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/794/files
  - new: https://git.openjdk.java.net/jdk/pull/794/files/dad21ff1..d29d4e09

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=794&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=794&range=01-02

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/794.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/794/head:pull/794

PR: https://git.openjdk.java.net/jdk/pull/794