Add a hide_layer_and_subtree() flag to cc::Layer

cc/layers/layer.h

Index: cc/layers/layer.h
diff --git a/cc/layers/layer.h b/cc/layers/layer.h
index 91972b35204d701e4278fdf1a0fa0e1d8ff0319e..7fc53b3dcd40845a3eb007941aa4142e4afbd839 100644
--- a/cc/layers/layer.h
+++ b/cc/layers/layer.h
@@ -268,6 +268,9 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
 
   void SetIsDrawable(bool is_drawable);
 
+  void SetHideLayerAndSubtree(bool hide);
+  bool hide_layer_and_subtree() const { return hide_layer_and_subtree_; }
+
   void SetReplicaLayer(Layer* layer);
   Layer* replica_layer() { return replica_layer_.get(); }
   const Layer* replica_layer() const { return replica_layer_.get(); }
@@ -465,6 +468,7 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
   bool is_container_for_fixed_position_layers_;
   LayerPositionConstraint position_constraint_;
   bool is_drawable_;
+  bool hide_layer_and_subtree_;
   bool masks_to_bounds_;
   bool contents_opaque_;
   bool double_sided_;