Revert of Don't rely on values computed as a side effect of paint.

Source/core/rendering/RenderLayer.cpp

Index: Source/core/rendering/RenderLayer.cpp
diff --git a/Source/core/rendering/RenderLayer.cpp b/Source/core/rendering/RenderLayer.cpp
index 2265e5efa264c513d7358f57838c3b5589103408..9ff127f6f537d2f806cc3a4ce0bf1d84141bd25f 100644
--- a/Source/core/rendering/RenderLayer.cpp
+++ b/Source/core/rendering/RenderLayer.cpp
@@ -3313,6 +3313,11 @@
         renderer()->repaintRectangle(rect);
 }
 
+bool RenderLayer::hasBlockSelectionGapBounds() const
+{
+    return !m_blockSelectionGapsBounds.isEmpty();
+}
+
 bool RenderLayer::intersectsDamageRect(const LayoutRect& layerBounds, const LayoutRect& damageRect, const RenderLayer* rootLayer, const LayoutPoint* offsetFromRoot) const
 {
     // Always examine the canvas and the root.