RFR of JDK-8134599: Improve the code coverage for ThreadLocal

[Roger Riggs]

Hi Hamlin,

Sorry for the protracted delay.

This looks ok.

Roger


On 9/4/19 3:16 AM, Hamlin Li wrote:
> Would you please review the following patch?
>
> bug: https://bugs.openjdk.java.net/browse/JDK-8209824
>
> webrev: http://cr.openjdk.java.net/~mli/8209824/webrev.00/
>
>
> Thank you
>
> -Hamlin
>