Migrate base::TaskRunner from Closure to OnceClosure

base/test/test_mock_time_task_runner.h

Index: base/test/test_mock_time_task_runner.h
diff --git a/base/test/test_mock_time_task_runner.h b/base/test/test_mock_time_task_runner.h
index 5c61a36f6973342f8d723c890b7ec81be22d5c29..2f892f52ccc1e608b10fae31fc19093bf5b0f889 100644
--- a/base/test/test_mock_time_task_runner.h
+++ b/base/test/test_mock_time_task_runner.h
@@ -141,10 +141,10 @@ class TestMockTimeTaskRunner : public SingleThreadTaskRunner {
   // SingleThreadTaskRunner:
   bool RunsTasksOnCurrentThread() const override;
   bool PostDelayedTask(const tracked_objects::Location& from_here,
-                       Closure task,
+                       OnceClosure task,
                        TimeDelta delay) override;
   bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here,
-                                  Closure task,
+                                  OnceClosure task,
                                   TimeDelta delay) override;
 
  protected: