[9] Review request for 8153522: Update JLightweightFrame to allow non-integer (and X/Y) scales

[Semyon Sadetsky]

Hello,

Please review fix for JDK9:
bug: https://bugs.openjdk.java.net/browse/JDK-8153522

webrev: http://cr.openjdk.java.net/~ssadetsky/8153522/webrev.00/

LightweightFrame Swing embedding API is updated for capability with 
floating point scale to make JavaFX SwingNode correctly shown on Windows 
platform.

Backward API compatibility is preserved but methods with old signatures 
are marked as deprecated.

--Semyon