RFR: 8285604: closed sun/java2d/GdiRendering/ClipShapeRendering.java failed with "Incorrect color ffeeeeee instead of ff0000ff in pixel (100, 100)" [v2]

[Phil Race]

> This was a closed test. It fails very rarely due to completely incorrect colour sampling by Robot.
> I had this happen to me when the window came up behind some other window on my desktop.
> So the "fix" here is to use setAlwaysOnTop(true)
> But so far as I can see there's no reason for this test to be closed so I am moving it to open as well.

Phil Race has updated the pull request incrementally with one additional commit since the last revision:

  8285604

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Changes:
  - all: https://git.openjdk.org/jdk/pull/11221/files
  - new: https://git.openjdk.org/jdk/pull/11221/files/aff0b9af..8e2bfc79

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11221&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11221&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/11221.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11221/head:pull/11221

PR: https://git.openjdk.org/jdk/pull/11221