Review request for 8151571: System/LoggerFinder tests fail after JDK-8149925

[Mandy Chung]

> On Mar 23, 2016, at 4:54 AM, Alan Bateman <Alan.Bateman at oracle.com> wrote:
> 
> On 22/03/2016 18:41, Mandy Chung wrote:
>> http://cr.openjdk.java.net/~mchung/jdk9/webrevs/8151571/webrev.00/
>> 
>> This restores the change in NativeBuffer to use the common Cleaner created by the system.   JDK-8149925 causes InnocuousThread be created early during startup before the system class loader is initialized.  Since the common Cleaner is intended for system cleaning code to use, this patch now creates InnocuousThread with null TCCL and expects the system cleaning code to handle null TCCL only if it uses it.
> This looks okay although the hasTCCL flag is a bit ugly. An alternative would be for InnocuousThread to take the TCCL in the constructor and have it reject all but null or the SCL.

I did consider taking ClassLoader parameter and I don’t like either option.  I was tempted to convert the constructors to factory methods to avoid passing a ClassLoader or hasTCCL.

Mandy