Deduplicate part of RenderLayerScrollableArea/ScrollableArea.

sky/engine/platform/scroll/ScrollableArea.cpp

Index: sky/engine/platform/scroll/ScrollableArea.cpp
diff --git a/sky/engine/platform/scroll/ScrollableArea.cpp b/sky/engine/platform/scroll/ScrollableArea.cpp
index b4a046d7264b0279cb3b6b1e2a67f8d76e34c1aa..6c5339b410a2d70e62bb27e4b7864357f444d760 100644
--- a/sky/engine/platform/scroll/ScrollableArea.cpp
+++ b/sky/engine/platform/scroll/ScrollableArea.cpp
@@ -420,14 +420,6 @@ void ScrollableArea::cancelProgrammaticScrollAnimation()
         programmaticScrollAnimator->cancelAnimation();
 }
 
-IntRect ScrollableArea::visibleContentRect(IncludeScrollbarsInRect scrollbarInclusion) const
-{
-    return IntRect(scrollPosition().x(),
-                   scrollPosition().y(),
-                   std::max(0, visibleWidth()),
-                   std::max(0, visibleHeight()));
-}
-
 IntPoint ScrollableArea::clampScrollPosition(const IntPoint& scrollPosition) const
 {
     return scrollPosition.shrunkTo(maximumScrollPosition()).expandedTo(minimumScrollPosition());
@@ -438,15 +430,6 @@ int ScrollableArea::lineStep(ScrollbarOrientation) const
     return pixelsPerLineStep();
 }
 
-int ScrollableArea::pageStep(ScrollbarOrientation orientation) const
-{
-    int length = (orientation == HorizontalScrollbar) ? visibleWidth() : visibleHeight();
-    int minPageStep = static_cast<float>(length) * minFractionToStepWhenPaging();
-    int pageStep = std::max(minPageStep, length - maxOverlapBetweenPages());
-
-    return std::max(pageStep, 1);
-}
-
 int ScrollableArea::documentStep(ScrollbarOrientation orientation) const
 {
     return scrollSize(orientation);