[8u-dev] Request for approval: 8147994 [macosx] JScrollPane jitters up/down during trackpad scrolling on MacOS/Aqua

[Sergey Bylokhov]

Hello,
These is a direct back port from jdk 9 to jdk 8u-dev.

8147994 [macosx] JScrollPane jitters up/down during trackpad scrolling 
on MacOS/Aqua
Bug: https://bugs.openjdk.java.net/browse/JDK-8147994
Webrev can be found at: http://cr.openjdk.java.net/~serb/8147994/webrev.02
jdk9 changeset: http://hg.openjdk.java.net/jdk9/client/jdk/rev/0c9bc87633bc
Review: 
http://mail.openjdk.java.net/pipermail/swing-dev/2016-February/005402.html
Reviewers: Alexey Ivanov, Alexander Potochkin


-- 
Best regards, Sergey.