RFR: 8186958: Need method to create pre-sized HashMap [v16]

[XenoAmess]

> 8186958: Need method to create pre-sized HashMap

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

  revert changes in:
  src/java.desktop
  src/java.management
  src/jdk.internal.vm.ci
  src/jdk.jfr
  src/jdk.management.jfr
  src/jdk.management
  src/utils/IdealGraphVisualizer

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7928/files
  - new: https://git.openjdk.java.net/jdk/pull/7928/files/ab8fbb83..2f5617bb

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7928&range=15
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7928&range=14-15

  Stats: 36 lines in 20 files changed: 0 ins; 0 del; 36 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7928.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7928/head:pull/7928

PR: https://git.openjdk.java.net/jdk/pull/7928