Get rid of one-off code in ScrollingCoordinator to handle graphics layer offsets.

Source/core/rendering/compositing/CompositedLayerMapping.cpp

Index: Source/core/rendering/compositing/CompositedLayerMapping.cpp
diff --git a/Source/core/rendering/compositing/CompositedLayerMapping.cpp b/Source/core/rendering/compositing/CompositedLayerMapping.cpp
index 4ba28f57c0d9d02067112deb5889b31d1e3167e5..d88f31f3a18192f1979ad119f444cfa1b9e43b8d 100644
--- a/Source/core/rendering/compositing/CompositedLayerMapping.cpp
+++ b/Source/core/rendering/compositing/CompositedLayerMapping.cpp
@@ -604,10 +604,6 @@ void CompositedLayerMapping::updateSquashingLayerGeometry(const LayoutPoint& off
         layers[i].offsetFromRendererSet = true;
 
         layers[i].renderLayer->setSubpixelAccumulation(subpixelAccumulation);
-
-        // FIXME: find a better design to avoid this redundant value - most likely it will make
-        // sense to move the paint task info into RenderLayer's m_compositingProperties.
-        layers[i].renderLayer->setOffsetFromSquashingLayerOrigin(layers[i].offsetFromRenderer);
     }
 
     squashingLayer->setPosition(squashLayerBounds.location());