Integrated: JDK-8297449: Update JInternalFrame Metal Border code

[Harshitha Onkar]

On Wed, 23 Nov 2022 00:46:57 GMT, Harshitha Onkar <honkar at openjdk.org> wrote:

> Updated Metal Border code for JInternalFrame. 
> 
> - Added instanceof check before casting Graphics to G2D.
> - Replaced roundHalfDown with Region.clipRound()

This pull request has now been integrated.

Changeset: 09629570
Author:    Harshitha Onkar <honkar at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/09629570f5d064dc2a5cd670de8d648156ac3991
Stats:     55 lines in 1 file changed: 17 ins; 22 del; 16 mod

8297449: Update JInternalFrame Metal Border code

Reviewed-by: aivanov, kizune

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PR: https://git.openjdk.org/jdk/pull/11305