RFR: Simplify JNI critical support

[Aleksey Shipilev]

On 09/21/2016 03:51 PM, Roman Kennke wrote:
> Am Mittwoch, den 21.09.2016, 07:56 -0400 schrieb Zhengyu Gu:
>> On 09/21/2016 07:50 AM, Aleksey Shipilev wrote:
> http://cr.openjdk.java.net/~rkennke/jni_critical/webrev.03/

All right, looks good!

-Aleksey