<Swing Dev> [9] Review Request: 6459800 Some Swing classes violate encapsulation by returning internal Insets

[Sergey Bylokhov]

Hello.
Please review a fix for jdk 9.
Most of the problems, which were found by the test, were fixed already, 
but one issue was found in Aqua.

Bug: https://bugs.openjdk.java.net/browse/JDK-6459800
Webrev can be found at: http://cr.openjdk.java.net/~serb/6459800/webrev.00

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Best regards, Sergey.