RFR: 8302513: remove sun.awt.util.IdentityLinkedList [v2]

[Stuart Marks]

> IdentityLinkedList is used in only one place, so it's fairly simple to replace it with IdentityArrayList.

Stuart Marks 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. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into JDK-8302513-remove-IdentityLinkedList
 - Replace IdentityLinkedList with IdentityArrayList.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/12567/files
  - new: https://git.openjdk.org/jdk/pull/12567/files/6798bed2..2fe572d5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12567&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12567&range=00-01

  Stats: 53674 lines in 1168 files changed: 23050 ins; 16195 del; 14429 mod
  Patch: https://git.openjdk.org/jdk/pull/12567.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12567/head:pull/12567

PR: https://git.openjdk.org/jdk/pull/12567