<AWT Dev> [8] Review Request for JDK-8024121 JViewPort.setScrollMode documentation should be updated

[Petr Pchelko]

Hello, AWT Team.

Please review the fix for the issue:
http://bugs.sun.com/view_bug.do?bug_id=8024121
The webrev is available here:
http://cr.openjdk.java.net/~pchelko/8024121/webrev/

SwingNode does not support the BLIT_SCROLL_MODE, so we've had to make a JViewPort automatically replace the BLIT_SCROLL_MODE to the BACKINGSTORE_SCROLL_MODE if it's added into the SwingNode.
This is a follow-up fix to update the JViewPort documentation.

With best regards. Petr.