RFR: JDK-8310681: Update WebKit to 616.1

[Johan Vos]

On Fri, 21 Jul 2023 17:04:44 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> Oh, I see that now. What led me to ask this question was that there is an alternative implementation in `#if PLATFORM(JAVA)`, which implies that we removed the call to `stripLeadingAndTrailingHTMLSpaces` and that it is still present in the upstream.
> 
> Given that this code block now matches the upstream, the `if..else..endif` block should simply be replaced with:
> 
> ```
>     return document().completeURL(linkAttribute);
> ```
> 
> removing the `#if PLATFORM(JAVA)` and the entire `#else` block (including the old call to `stripLeadingAndTrailingHTMLSpaces`). Otherwise it will be confusing and possibly lead to merge conflicts later.

I agree with this. Is there a reason this can't be done in the current PR?

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PR Comment: https://git.openjdk.org/jfx/pull/1180#issuecomment-1646875540