cc :: Move some tracking of layer_property_changed to main thread.

cc/trees/property_tree_builder.cc

Index: cc/trees/property_tree_builder.cc
diff --git a/cc/trees/property_tree_builder.cc b/cc/trees/property_tree_builder.cc
index 1d637229d0a00b57383950d6938e6478d8561a1e..36b3551574921197f1ea81154ba265b70bc81384 100644
--- a/cc/trees/property_tree_builder.cc
+++ b/cc/trees/property_tree_builder.cc
@@ -730,6 +730,14 @@ void SetBackfaceVisibilityTransform(LayerType* layer,
   }
 }
 
+static void SetLayerPropertyChangedForChild(Layer* parent, Layer* child) {
+  if (parent->subtree_property_changed())
+    child->SetSubtreePropertyChanged();
+}
+
+static void SetLayerPropertyChangedForChild(LayerImpl* parent,
+                                            LayerImpl* child) {}
+
 template <typename LayerType>
 void BuildPropertyTreesInternal(
     LayerType* layer,
@@ -762,6 +770,7 @@ void BuildPropertyTreesInternal(
   SetBackfaceVisibilityTransform(layer, created_transform_node);
 
   for (size_t i = 0; i < layer->children().size(); ++i) {
+    SetLayerPropertyChangedForChild(layer, layer->child_at(i));
     if (!layer->child_at(i)->scroll_parent()) {
       DataForRecursionFromChild<LayerType> data_from_child;
       BuildPropertyTreesInternal(layer->child_at(i), data_for_children,