Keep a cache of caret painters to avoid recomputing all the time.

Source/core/paint/ReplicaPainter.cpp

Index: Source/core/paint/ReplicaPainter.cpp
diff --git a/Source/core/paint/ReplicaPainter.cpp b/Source/core/paint/ReplicaPainter.cpp
index d3fdc8fccb56ed66d1c8f46ba73c4a74da8d91b4..606107a1b1895711139931677643e55a3a0d89b6 100644
--- a/Source/core/paint/ReplicaPainter.cpp
+++ b/Source/core/paint/ReplicaPainter.cpp
@@ -24,7 +24,7 @@ void ReplicaPainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paintO
         // Turn around and paint the parent layer. Use temporary clipRects, so that the layer doesn't end up caching clip rects
         // computing using the wrong rootLayer
         DeprecatedPaintLayer* rootPaintingLayer = m_layoutReplica.layer()->transform() ? m_layoutReplica.layer()->parent() : m_layoutReplica.layer()->enclosingTransformedAncestor();
-        DeprecatedPaintLayerPaintingInfo paintingInfo(rootPaintingLayer, LayoutRect(paintInfo.rect), PaintBehaviorNormal, LayoutSize(), 0);
+        DeprecatedPaintLayerPaintingInfo paintingInfo(rootPaintingLayer, LayoutRect(paintInfo.rect), PaintBehaviorNormal, LayoutSize(), 0, paintInfo.paintDataCache());
         PaintLayerFlags flags = PaintLayerHaveTransparency | PaintLayerAppliedTransform | PaintLayerUncachedClipRects | PaintLayerPaintingReflection;
         DeprecatedPaintLayerPainter(*m_layoutReplica.layer()->parent()).paintLayer(paintInfo.context, paintingInfo, flags);
     } else if (paintInfo.phase == PaintPhaseMask) {