cc: Move SyncedScrollOffset to scroll tree

cc/trees/layer_tree_impl.cc

Index: cc/trees/layer_tree_impl.cc
diff --git a/cc/trees/layer_tree_impl.cc b/cc/trees/layer_tree_impl.cc
index 3d608f1012ac6780e6052710230a58cc0ce7466e..e7c1870b82e1c6eb741dde94c9450672a520f6b0 100644
--- a/cc/trees/layer_tree_impl.cc
+++ b/cc/trees/layer_tree_impl.cc
@@ -321,6 +321,7 @@ void LayerTreeImpl::PushPropertiesTo(LayerTreeImpl* target_tree) {
   LayerImpl* layer = target_tree->CurrentlyScrollingLayer();
   target_tree->SetPropertyTrees(property_trees_);
   target_tree->SetCurrentlyScrollingLayer(layer);
+  target_tree->UpdatePropertyTreeScrollOffset(&property_trees_);
 
   if (next_activation_forces_redraw_) {
     target_tree->ForceRedrawNextActivation();
@@ -628,10 +629,7 @@ void LayerTreeImpl::ApplySentScrollAndScaleDeltasFromAbortedCommit() {
   if (!root_layer())
     return;
 
-  LayerTreeHostCommon::CallFunctionForSubtree(
-      root_layer(), [](LayerImpl* layer) {
-        layer->ApplySentScrollDeltasFromAbortedCommit();
-      });
+  property_trees()->scroll_tree.ApplySentScrollDeltasFromAbortedCommit();
 }
 
 void LayerTreeImpl::SetViewportLayersFromIds(