RFR: 8356061: [macos] com/apple/laf/RootPane/RootPaneDefaultButtonTest.java test fails on macosx-aarch64 machine [v2]

[Jeremy Wood]

> Unfortunately I'm unable to reproduce this failure. I slowed the test down; it passes on my machine before and after this PR.
> 
> I added a little bit of logging that might also help identify what's happening.
> 
> Does anyone have any more suggestions?

Jeremy Wood has updated the pull request incrementally with two additional commits since the last revision:

 - 8356061: restructuring to move things to EDT
   
   This was requested here:
   https://github.com/openjdk/jdk/pull/25244#discussion_r2091656355
   
   mrserb asked: "Also please move creation and access_to all Swing components to EDT"
   
   (I'm not sure this will help much? My understanding was *creation* of Swing components could happen off the EDT as long as they were made displayable on the EDT.)
   
   Now we still call jc.getLocationOnScreen off the EDT. If that posed a thread-based problem it'd probably manifest as a IllegalComponentStateException, which is not mentioned in 8356061.
 - 8356061: adding 1000ms pause after window construction
   
   This was requested here:
   https://github.com/openjdk/jdk/pull/25244#discussion_r2091656355
   
   So now we'll pause at least 1.1s before the first call to `jc.getLocationOnScreen`, and at least 2.1s before the first call to `robot.getPixelColor(x, y)`.
   
   (getLocationOnScreen has never failed with an IllegalStateException.)

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25244/files
  - new: https://git.openjdk.org/jdk/pull/25244/files/b7270924..b076c964

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25244&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25244&range=00-01

  Stats: 183 lines in 1 file changed: 92 ins; 77 del; 14 mod
  Patch: https://git.openjdk.org/jdk/pull/25244.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25244/head:pull/25244

PR: https://git.openjdk.org/jdk/pull/25244