RFR: 8316627: JViewport Test headless failure

[Phil Race]

On Wed, 20 Sep 2023 21:12:55 GMT, Damon Nguyen <dnguyen at openjdk.org> wrote:

> Converted test needs headful tag added to avoid failures.

How did this get through ? Was it not tested before pushing ?
And if a test needs "Robot" it surely expects a headful envt ?
In fact I am going to say that the problem here is using Robot at all.
You don't need to add headful, you just need to get rid of Robot which is just being used to do unnecessary Thread.sleep() calls.

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Changes requested by prr (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/15847#pullrequestreview-1636539616