RFR: 8229135: ZGC: Adding missing ZStatTimerDisable before call to ZVerify::roots_strong()

[Per Liden]

Thanks Stefan!

/Per

On 8/5/19 4:01 PM, Stefan Karlsson wrote:
> Looks good.
> 
> StefanK
> 
> On 2019-08-05 15:47, Per Liden wrote:
>> ZVerify::roots_strong() is called outside of a ZStatTimerDisable 
>> scope, which means the root scanning stat counters/samplers will be 
>> polluted.
>>
>> (This fix was originally part of JDK-8229017, but Stefan asked me to 
>> break this out into a separate fix)
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8229135
>> Webrev: http://cr.openjdk.java.net/~pliden/8229135/webrev.0
>>
>> /Per