RFR (S) 8231472: Clean up Monitor::_safepoint_check usage to Mutex::_safepoint_check

[coleen.phillimore at oracle.com]

Thanks Robbin and David.
Coleen

On 9/27/19 3:17 AM, Robbin Ehn wrote:
> Good, thanks!
>
> /Robbin
>
> On 9/27/19 12:13 AM, coleen.phillimore at oracle.com wrote:
>> Summary: Change Monitor:: to Mutex:: when allocating a Mutex, and in 
>> mutexLocker.
>>
>> Small cleanup.  Tested with tier1 on Oracle platforms.
>>
>> open webrev at 
>> http://cr.openjdk.java.net/~coleenp/2019/8231472.01/webrev
>> bug link https://bugs.openjdk.java.net/browse/JDK-8231472
>>
>> Thanks,
>> Coleen