RFR: 8260577: Unused code in AbstractCompiler after Shark compiler removal [v3]

[Tobias Hartmann]

> After removal of the Shark compiler with [JDK-8171853](https://bugs.openjdk.java.net/browse/JDK-8171853) in JDK 10, some methods in AbstractCompiler are unused.
> 
> Thanks,
> Tobias

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

  Revert "Removed CICompileNatives and CICompileOSR"
  
  This reverts commit a95c358687495ee1ed701cd10d48a3a9c6a45f26.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2281/files
  - new: https://git.openjdk.java.net/jdk/pull/2281/files/a95c3586..42c487e1

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2281&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2281&range=01-02

  Stats: 36 lines in 14 files changed: 33 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2281.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2281/head:pull/2281

PR: https://git.openjdk.java.net/jdk/pull/2281