Delete a bunch of paint invalidation rect computing code.

sky/engine/core/rendering/RenderBox.cpp

Index: sky/engine/core/rendering/RenderBox.cpp
diff --git a/sky/engine/core/rendering/RenderBox.cpp b/sky/engine/core/rendering/RenderBox.cpp
index bba60cbee34147befdddde1aeed6ecb8462c75d5..7858a9e7374730d661d2d68fd9a533b898a138d5 100644
--- a/sky/engine/core/rendering/RenderBox.cpp
+++ b/sky/engine/core/rendering/RenderBox.cpp
@@ -988,25 +988,6 @@ bool RenderBox::paintInvalidationLayerRectsForImage(WrappedImagePtr image, const
     return false;
 }
 
-void RenderBox::clearPaintInvalidationState(const PaintInvalidationState& paintInvalidationState)
-{
-    RenderBoxModelObject::clearPaintInvalidationState(paintInvalidationState);
-
-    if (ScrollableArea* area = scrollableArea())
-        area->resetScrollbarDamage();
-}
-
-#if ENABLE(ASSERT)
-bool RenderBox::paintInvalidationStateIsDirty() const
-{
-    if (ScrollableArea* area = scrollableArea()) {
-        if (area->hasVerticalBarDamage() || area->hasHorizontalBarDamage())
-            return true;
-    }
-    return RenderBoxModelObject::paintInvalidationStateIsDirty();
-}
-#endif
-
 bool RenderBox::pushContentsClip(PaintInfo& paintInfo, const LayoutPoint& accumulatedOffset, ContentsClipBehavior contentsClipBehavior)
 {
     if (paintInfo.phase == PaintPhaseBlockBackground || paintInfo.phase == PaintPhaseSelfOutline || paintInfo.phase == PaintPhaseMask)
@@ -1241,13 +1222,6 @@ void RenderBox::deleteLineBoxWrapper()
     }
 }
 
-LayoutRect RenderBox::clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const
-{
-    LayoutRect r = visualOverflowRect();
-    mapRectToPaintInvalidationBacking(paintInvalidationContainer, r, paintInvalidationState);
-    return r;
-}
-
 void RenderBox::mapRectToPaintInvalidationBacking(const RenderLayerModelObject* paintInvalidationContainer, LayoutRect& rect, const PaintInvalidationState* paintInvalidationState) const
 {
     // The rect we compute at each step is shifted by our x/y offset in the parent container's coordinate space.