Route selection bounds updates through WebLayerTreeView

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 70b7622e19c428d34775e5e7d5d26bef7804f207..f96df531e504e6cac84addc8667b7d8348668946 100644
--- a/Source/core/rendering/RenderLayer.cpp
+++ b/Source/core/rendering/RenderLayer.cpp
@@ -536,6 +536,25 @@ LayoutPoint RenderLayer::positionFromPaintInvalidationBacking(const RenderObject
     return point;
 }
 
+void RenderLayer::mapPointToPaintBackingCoordinates(const RenderLayerModelObject* paintInvalidationContainer, FloatPoint& point)
+{
+    RenderLayer* paintInvalidationLayer = paintInvalidationContainer->layer();
+    if (!paintInvalidationLayer->groupedMapping()) {
+        point.move(paintInvalidationLayer->compositedLayerMapping()->contentOffsetInCompositingLayer());
+        return;
+    }
+
+    RenderLayerModelObject* transformedAncestor = paintInvalidationLayer->enclosingTransformedAncestor()->renderer();
+    if (!transformedAncestor)
+        return;
+
+    // |paintInvalidationContainer| may have a local 2D transform on it, so take that into account when mapping into the space of the
+    // transformed ancestor.
+    point = paintInvalidationContainer->localToContainerPoint(point, transformedAncestor);
+
+    point.moveBy(-paintInvalidationLayer->groupedMapping()->squashingOffsetFromTransformedAncestor());
+}
+
 void RenderLayer::mapRectToPaintBackingCoordinates(const RenderLayerModelObject* paintInvalidationContainer, LayoutRect& rect)
 {
     RenderLayer* paintInvalidationLayer = paintInvalidationContainer->layer();