cc : Add LayerToPropertyTreeIndices map to PropertyTrees

cc/trees/property_tree.cc

Index: cc/trees/property_tree.cc
diff --git a/cc/trees/property_tree.cc b/cc/trees/property_tree.cc
index 6af13f64723a9c70d387da42f7e359a680df3faf..b75507f06c7ee05603f7bdc6227ac270a3f78395 100644
--- a/cc/trees/property_tree.cc
+++ b/cc/trees/property_tree.cc
@@ -1923,6 +1923,10 @@ PropertyTrees& PropertyTrees::operator=(const PropertyTrees& from) {
   effect_tree = from.effect_tree;
   clip_tree = from.clip_tree;
   scroll_tree = from.scroll_tree;
+  transform_node_owner_to_node_map = from.transform_node_owner_to_node_map;
+  effect_node_owner_to_node_map = from.effect_node_owner_to_node_map;
+  clip_node_owner_to_node_map = from.clip_node_owner_to_node_map;
+  scroll_node_owner_to_node_map = from.scroll_node_owner_to_node_map;

[ajuma, 2016/05/13 14:38:53]

Do these also need to be handled in ToProtobuf and FromProtobuf?

[jaydasika, 2016/05/13 19:40:39]

I have added code to reconstruct the map rather than sending it as we anyway
walk all property trees in FromProtobuf

   needs_rebuild = from.needs_rebuild;
   changed = from.changed;
   full_tree_damaged = from.full_tree_damaged;