hg: openjfx/8/graphics/rt: Comment RT-26702: Poor DisplacementMap effect performance on Mac [Java code only, fixes potential drawing of garbage on first frame on OS X]

[hang.vo at oracle.com]

Changeset: eb0ca6ba0558
Author:    snorthov
Date:      2013-05-29 16:57 -0400
URL:       http://hg.openjdk.java.net/openjfx/8/graphics/rt/rev/eb0ca6ba0558

Comment	RT-26702: Poor DisplacementMap effect performance on Mac [Java code only, fixes potential drawing of garbage on first frame on OS X]

! javafx-ui-quantum/src/com/sun/javafx/tk/quantum/UploadingPainter.java