Migrate base::TaskRunner from Closure to OnceClosure

components/memory_pressure/memory_pressure_monitor_unittest.cc

Index: components/memory_pressure/memory_pressure_monitor_unittest.cc
diff --git a/components/memory_pressure/memory_pressure_monitor_unittest.cc b/components/memory_pressure/memory_pressure_monitor_unittest.cc
index e295c8359634bfa80633b8bbc7d53376fe932c0c..ac608bf7923f2758f29b67ca5a92b2966ce3f939 100644
--- a/components/memory_pressure/memory_pressure_monitor_unittest.cc
+++ b/components/memory_pressure/memory_pressure_monitor_unittest.cc
@@ -48,7 +48,7 @@ class TaskRunnerProxy : public base::TaskRunner {
   explicit TaskRunnerProxy(MockTaskRunner* mock) : mock_(mock) {}
   bool RunsTasksOnCurrentThread() const override { return true; }
   bool PostDelayedTask(const tracked_objects::Location& location,
-                       base::Closure closure,
+                       base::OnceClosure closure,
                        base::TimeDelta delta) override {
     return mock_->PostDelayedTask(location, delta);
   }