cc : Make tree synchronization independent of layer tree hierarchy (2)

cc/layers/layer_proto_converter.h

Index: cc/layers/layer_proto_converter.h
diff --git a/cc/layers/layer_proto_converter.h b/cc/layers/layer_proto_converter.h
index 94afcb91f7bfd82fa29ed7849efd69bba3c5c0c3..0272d3568cb805d0ad0a8f6eab93b398f9921214 100644
--- a/cc/layers/layer_proto_converter.h
+++ b/cc/layers/layer_proto_converter.h
@@ -35,11 +35,10 @@ class CC_EXPORT LayerProtoConverter {
       const scoped_refptr<Layer> existing_root,
       const proto::LayerNode& root_node);
 
-  // Starting at |root_layer|, serializes the properties of all the dirty nodes
-  // in the Layer hierarchy. The proto::LayerUpdate will contain all nodes that
-  // either are dirty or have dirty descendants. Only nodes that are dirty will
-  // contain the list of dirty properties.
-  static void SerializeLayerProperties(Layer* root_layer,
+  // Serializes the properties of all the dirty nodes in the Layer hierarchy.
+  // The proto::LayerUpdate will contain all nodes that are dirty.  Only nodes
+  // that are dirty will contain the list of dirty properties.

[ajuma, 2016/03/18 14:33:15]

Since the update only contains dirty nodes now, all nodes will have a list of
dirty properties, right?

Also, this comment should mention that the list of layers needing push
properties is cleared out by this method.

[jaydasika, 2016/03/19 02:17:58]

Done.

+  static void SerializeLayerProperties(LayerTreeHost* host,
                                        proto::LayerUpdate* layer_update);
 
   // Iterate over all updated layers from the LayerUpdate, and update the