[jdk11u-dev] RFR: 8225377: type annotations are not visible to javac plugins across compilation boundaries [v2]

[Liam Miller-Cushon]

> Hi,
>  
> This is a backport of [JDK-8225377: type annotations are not visible to javac plugins across compilation boundaries](https://bugs.openjdk.org/browse/JDK-8225377)
> 
> The patch did not apply cleanly. I resolved a merge conflict with the imports, and due to changes to the internal `TypeMetadata` API for JDK-8303820.
> 
> The modified test fails without the patch, and passes with it. The patch passes `langtools:tier1` tests.

Liam Miller-Cushon 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 backport-JDK-8225377
 - Backport de6667cf11aa59d1bab78ae5fb235ea0b901d5c4

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

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/2272/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/2272/files/747dad7d..ec63a752

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2272&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2272&range=00-01

  Stats: 23036 lines in 582 files changed: 6958 ins; 15179 del; 899 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2272.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2272/head:pull/2272

PR: https://git.openjdk.org/jdk11u-dev/pull/2272