RFR: 8356982: Update WebKit to 622.1 [v2]

[Jay Bhaskar]

On Mon, 11 Aug 2025 21:40:08 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> modules/javafx.web/src/main/native/Source/WebCore/Modules/compression/CompressionStreamEncoder.cpp line 91:
>> 
>>> 89:     return result != Z_OK && result != Z_STREAM_END && result != Z_BUF_ERROR;
>>> 90: #endif
>>> 91:     return true;
>> 
>> How did this even compile previously? Is this file actually included in our build?
>
> Independent of how the code compiled before, it was clearly wrong.
> 
> So the more interesting question is: Is `true` the right return value for our port of WebKit? That appears to be an error return for this method.

zlib is not supported on our platform due to zlib dependency, so m_zstream is unused. didDeflateFinish() always returns true to indicate immediate completion with no side effects. 
m_zstream is never initialized or used in your MYP port
No compression work is done at all
Returning true simply tells the caller “we’re done,” which is correct for a no-op compression path

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PR Review Comment: https://git.openjdk.org/jfx/pull/1865#discussion_r2268492223