[9] Review request for 8072676: [macosx] Jtree icon painted over label when scrollbars present in window

[Anton Nashatyrev]

Hello,
    could you please review the following fix:
fix: http://cr.openjdk.java.net/~anashaty/8072676/9/webrev.00/ 
<http://cr.openjdk.java.net/%7Eanashaty/8072676/9/webrev.00/>
bug: https://bugs.openjdk.java.net/browse/JDK-8072676

    Problem: Tree icon is painted outside of the component bounds

    Fix: when painting the icon the Graphics.clip() should be used 
instead of Graphics.setClip().

Thanks!
Anton.