Removed ScrollingCoordinator and a bunch of composited scrolling'

sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp

Index: sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
diff --git a/sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp b/sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
index 8055be8e16dd8babcf8bdbdc00782e370f53ba2c..498ed9a17c1844ab2b7b63b373a04ba29ae3ba2d 100644
--- a/sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
+++ b/sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
@@ -83,21 +83,6 @@ void GraphicsLayerTreeBuilder::rebuild(RenderLayer& layer, AncestorInfo info)
     if (hasCompositedLayerMapping) {
         currentCompositedLayerMapping->parentForSublayers()->setChildren(layerChildren);
 
-        // If the layer has a clipping layer the overflow controls layers will be siblings of the clipping layer.
-        // Otherwise, the overflow control layers are normal children.
-        // FIXME: Why isn't this handled in CLM updateInternalHierarchy?
-        if (!currentCompositedLayerMapping->hasClippingLayer() && !currentCompositedLayerMapping->hasScrollingLayer()) {
-            if (GraphicsLayer* overflowControlLayer = currentCompositedLayerMapping->layerForHorizontalScrollbar()) {
-                overflowControlLayer->removeFromParent();
-                currentCompositedLayerMapping->parentForSublayers()->addChild(overflowControlLayer);
-            }
-
-            if (GraphicsLayer* overflowControlLayer = currentCompositedLayerMapping->layerForVerticalScrollbar()) {
-                overflowControlLayer->removeFromParent();
-                currentCompositedLayerMapping->parentForSublayers()->addChild(overflowControlLayer);
-            }
-        }
-
         info.childLayersOfEnclosingCompositedLayer->append(currentCompositedLayerMapping->childForSuperlayers());
     }