[jdk8u-dev] RFR: 8154043: Fields not reachable anymore by tab-key, because of new tabbing behaviour of radio button groups. [v2]

[ktakakuri]

> This is a backport of JDK-8154043: Fields not reachable anymore by tab-key, because of new tabbing behaviour of radio button groups.
> 
> Applying the JDK-8154043 fix as is will result in a regression of JDK-8182577.
> The fix of JDK-8182577 adds an interface for JDK10, therefore this fix cannot be backported simply for JDK8u.
> So, I propose to judge the buttonModel is an instance of DefaultButtonModel.
> 
> Testing:
> java/awt
> javax/swing
> ButtonGroupLayoutTraversalTest.java
> bug8033699.java
> DefaultButtonModelCrashTest.java
> on Windows x86_64

ktakakuri 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 six additional commits since the last revision:

 - Merge branch 'openjdk:master' into 8154043
 - Chmod ButtonGroupLayoutTraversalTest
 - Chmod DefaultButtonModelCrashTest
 - Fix the copyright year
 - Backport f3abf05b31893b9a066a436e2c4a587f8899ab10
 - Backport 8d81ec63b2bafc431cbb8572a3e45e76580ab46f

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

Changes:
  - all: https://git.openjdk.org/jdk8u-dev/pull/285/files
  - new: https://git.openjdk.org/jdk8u-dev/pull/285/files/6a8e5fe6..cc8ef7ee

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=285&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=285&range=00-01

  Stats: 16730 lines in 168 files changed: 13866 ins; 778 del; 2086 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/285.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/285/head:pull/285

PR: https://git.openjdk.org/jdk8u-dev/pull/285