RFR: 8320971: Use BufferedInputStream.buf directly when param of implTransferTo() is trusted [v15]

[Sergey Tsypanov]

On Sat, 16 Dec 2023 17:51:30 GMT, Markus KARG <duke at openjdk.org> wrote:

>> Sergey Tsypanov has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   8320971: Revert irrelevant changes
>
> test/jdk/java/io/BufferedInputStream/TransferToTrusted.java line 85:
> 
>> 83:     }
>> 84: 
>> 85:     private static void byteArrayOutputStream(BufferedInputStream bis, byte[] buf) throws IOException {
> 
> As we agreed that this PR shall only cover BIS, we can remove the additional classes' tests again.

Shouldn't we keep at least the method for the classes checked in `BIS.isTrusted()` (`ByteArrayOutputStream`, `FileOutputStream`, `PipedOutputStream`)?

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PR Review Comment: https://git.openjdk.org/jdk/pull/16879#discussion_r1431195222