<AWT Dev> [9] Review request for JDK-8173876 Fast precise scrolling and DeltaAccumulator fix for macOS Sierra 10.12.2

[Sergey Malenkov]

Hello,

Could you please review the following fix:
  bug: http://bugs.openjdk.java.net/browse/JDK-8173876
  webrev: http://cr.openjdk.java.net/~alexsch/sergey.malenkov/8173876/webrev-all.00

It improves our previous fixes after changes in macOS Sierra 10.12.2

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Best regards,
Sergey A. Malenkov