| Index: base/task_scheduler/sequence.cc
 | 
| diff --git a/base/task_scheduler/sequence.cc b/base/task_scheduler/sequence.cc
 | 
| index 601b5402d069b489b70f960a04931e9875c8d520..9867c1dfd20d07d43f8bb0f5efc370757d7659bb 100644
 | 
| --- a/base/task_scheduler/sequence.cc
 | 
| +++ b/base/task_scheduler/sequence.cc
 | 
| @@ -15,6 +15,8 @@ namespace internal {
 | 
|  Sequence::Sequence() = default;
 | 
|  
 | 
|  bool Sequence::PushTask(std::unique_ptr<Task> task) {
 | 
| +  DCHECK(task);
 | 
| +  DCHECK(task->task);
 | 
|    DCHECK(task->sequenced_time.is_null());
 | 
|    task->sequenced_time = base::TimeTicks::Now();
 | 
|  
 | 
| 
 |