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Add a comment, pertinent to scrolling
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@ -257,6 +257,9 @@ void ScrollBar::SetScrollbar(int position, int thumbSize,
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{
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// Mitigate flashing of scrollbars by refreshing only when something really changes.
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// PRL: This may have been made unnecessary by other fixes for flashing, see
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// commit ac05b190bee7dd0000bce56edb0e5e26185c972f
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auto changed =
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position != GetThumbPosition() ||
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thumbSize != GetThumbSize() ||
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