| Index: cc/ipc/begin_frame_args.mojom | 
| diff --git a/cc/ipc/begin_frame_args.mojom b/cc/ipc/begin_frame_args.mojom | 
| index 8b16c62a4a8cf19058c05f50c930c9cd78313f4c..ad53658a220ea8725711689c96f20fa035f4d27b 100644 | 
| --- a/cc/ipc/begin_frame_args.mojom | 
| +++ b/cc/ipc/begin_frame_args.mojom | 
| @@ -18,6 +18,8 @@ struct BeginFrameArgs { | 
| mojo.common.mojom.TimeTicks frame_time; | 
| mojo.common.mojom.TimeTicks deadline; | 
| mojo.common.mojom.TimeDelta interval; | 
| +  uint64 sequence_number; | 
| +  uint32 source_id; | 
| BeginFrameArgsType type; | 
| bool on_critical_path; | 
| }; | 
|  |