RFR: JDK-8299977 : Update WebKit to 615.1 [v3]

Wed Feb 1 12:48:04 UTC 2023

On Wed, 1 Feb 2023 04:11:48 GMT, Hima Bindu Meda <hmeda at openjdk.org> wrote:

>> Update JavaFX WebKit to GTK WebKit 2.38 (615.1).
>> 
>> Verified the updated version build, sanity tests and stability.
>> This does not cause any issues except one unit test failure.
>> Also, there are some artifacts observed while playing youtube
>> 
>> The above issues are recorded and ignored using below bugs:
>> [JDK-8300954](https://bugs.openjdk.org/browse/JDK-8300954)
>> [JDK-8301022](https://bugs.openjdk.org/browse/JDK-8301022)
>
> Hima Bindu Meda has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove the log added for testing purpose

Marked as reviewed by kcr (Lead).

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PR: https://git.openjdk.org/jfx/pull/1011