RFR: 8359053: Implement JEP 504 - Remove the Applet API [v6]

[Phil Race]

On Thu, 12 Jun 2025 23:08:38 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>> After the applet removal, this could be dead code. It might be better not to mention JInternalFrame unless we have prove that the code actually works for it, add a TODO? or something?
>
> it could be related to appletviewer

Unlikely. JInternalFrame is a RootPaneContainer and validate root. It has a  set size and stuff resized within it do NOT make the containing Container revalidate.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25698#discussion_r2145955172