[8-dev] Review request for 8166591 [macos 10.12] Trackpad scrolling of text on OS X 10.12 Sierra is very fast (Trackpad, Retina only)

[Alexandr Scherbatiy]

  Hello,
 Could you review the backport of the fix to the JDK8u-dev:
  http://cr.openjdk.java.net/~alexsch/8166591/webrev-jdk8.00

  This is just the same fix as for the JDK 9 (see [1]). There are some 
style differences between JDK 8u-dev and JDK 9 which I needed to merge 
manually. All logic is just the same.

  [1]  http://cr.openjdk.java.net/~alexsch/8166591/webrev.09

  Thanks,
  Alexandr.