<Swing Dev> [9] Backport Request: JDK-8069268 JComponent.AccessibleJComponent.addPropertyListeners adds exponential listeners

[Vivi An]

Hello,

Please approve below bug fix in jdk8u-dev.

Bug Description:
In Component/Container/JComponent's AccessibleContext inner classes, a 
private variable propertyListenersCount is used to make sure a specific 
listener is only added once through addPropertyChangeListener. However, 
ContainerListener which declared in Container's inner class was added to 
PropertyChangeListener in both Container and it's child class,*in case 
of nested levels us*ed,*  exponential listeners will be adde*d and lead 
to performance issue*. *
***
**Fix Description:
The fix removed code in AccessibleJComponent(Inner class of JComponent*) 
which *add*ing *listener**declared *and*added as property change 
listener through parent class. This way, the listener won't be added 
twice and lead to exponential listeners added in nested levels case.*

**

Bug: https://bugs.openjdk.java.net/browse/JDK-8069268
JDK8 Changeset: 
http://hg.openjdk.java.net/jdk8u/jdk8u-dev/jdk/rev/aafe81a686a2

Review completed by Pete Brunet and Sergey Bylokhov.

Thank you

Regards,

Vivi