| Index: cc/proto/layer_tree_host.proto | 
| diff --git a/cc/proto/layer_tree_host.proto b/cc/proto/layer_tree_host.proto | 
| index 9a6ac1124cbe48b344a406e35472e6af95620093..d1d78e71b8e15ffb9c7490887d1916daae3f6a5e 100644 | 
| --- a/cc/proto/layer_tree_host.proto | 
| +++ b/cc/proto/layer_tree_host.proto | 
| @@ -53,6 +53,7 @@ message LayerTreeHost { | 
| optional PropertyTrees property_trees = 31; | 
| optional uint32 surface_id_namespace = 32; | 
| optional uint32 next_surface_sequence = 33; | 
| -  optional bool have_wheel_event_handlers = 34; | 
| +  optional uint32 wheel_event_listener_properties = 34; | 
| optional bool have_scroll_event_handlers = 35; | 
| +  optional uint32 touch_event_listener_properties = 36; | 
| } | 
|  |