RFR: 8310266 JFR: Refactor after 'view' command

[Erik Gahlin]

8310266 JFR: Refactor after 'view' command

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

Commit messages:
 - Initial

Changes: https://git.openjdk.org/jdk/pull/14532/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14532&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310266
  Stats: 1925 lines in 56 files changed: 827 ins; 951 del; 147 mod
  Patch: https://git.openjdk.org/jdk/pull/14532.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14532/head:pull/14532

PR: https://git.openjdk.org/jdk/pull/14532