RFR: 8262028: Make InstanceKlass::implementor return InstanceKlass

[Harold Seigel]

On Fri, 26 Feb 2021 20:27:09 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> Please review this small fix to change the parameter and return types from Klass* to InstanceKlass* in the InstanceKlass::*implementor() functions.
>> 
>> The fix was tested with Mach5 tiers 1 and 2 on Linux, Mac OS, and Windows, and tiers 3-5 on Linux x64.
>> 
>> Thanks, Harold
>
> Looks good!

Thanks Coleen, Calvin. and Vladimir for the reviews!

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PR: https://git.openjdk.java.net/jdk/pull/2755