cc/blimp: Set up the framework for state serialization.

cc/layers/picture_layer.cc

Index: cc/layers/picture_layer.cc
diff --git a/cc/layers/picture_layer.cc b/cc/layers/picture_layer.cc
index f9976273c76e0ec53471d164ff18a5ab913e39f2..25e6c3e679b0958eb7c59f853b7e49cb26557a01 100644
--- a/cc/layers/picture_layer.cc
+++ b/cc/layers/picture_layer.cc
@@ -206,9 +206,9 @@ void PictureLayer::SetTypeForProtoSerialization(proto::LayerNode* proto) const {
   proto->set_type(proto::LayerNode::PICTURE_LAYER);
 }
 
-void PictureLayer::LayerSpecificPropertiesToProto(
-    proto::LayerProperties* proto) {
-  Layer::LayerSpecificPropertiesToProto(proto);
+void PictureLayer::LayerSpecificPropertiesToProto(proto::LayerProperties* proto,
+                                                  bool inputs_only) {
+  Layer::LayerSpecificPropertiesToProto(proto, inputs_only);
   DropRecordingSourceContentIfInvalid();
 
   proto::PictureLayerProperties* picture = proto->mutable_picture();