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simon.fraser@apple.com authored
Reviewed by Darin Adler. Avoid doing work in FrameView::scrollPositionChanged() if there are no fixed position elements https://bugs.webkit.org/show_bug.cgi?id=36994 r55890 added knowledge to FrameView about whether it contains any fixed-position elements. We can use this to avoid updating widget positions, and compositing layer positions when possible. * page/FrameView.cpp: (WebCore::FrameView::scrollPositionChanged): * page/FrameView.h: (WebCore::FrameView::hasFixedObjects): git-svn-id: http://svn.webkit.org/repository/webkit/trunk@57009 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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