Use TestSimpleTaskRunner::NumPendingTasks instead of GetPendingTasks().size()

base/task/cancelable_task_tracker_unittest.cc

Index: base/task/cancelable_task_tracker_unittest.cc
diff --git a/base/task/cancelable_task_tracker_unittest.cc b/base/task/cancelable_task_tracker_unittest.cc
index 5444038f83cf04a5f6b0512dba0e39046e82bf06..01a1f23c8aa3c8c50ece1f7dcd3660ddfe91cad8 100644
--- a/base/task/cancelable_task_tracker_unittest.cc
+++ b/base/task/cancelable_task_tracker_unittest.cc
@@ -112,7 +112,7 @@ TEST_F(CancelableTaskTrackerTest, CancelPostedTask) {
       test_task_runner.get(), FROM_HERE, MakeExpectedNotRunClosure(FROM_HERE));
   EXPECT_NE(CancelableTaskTracker::kBadTaskId, task_id);
 
-  EXPECT_EQ(1U, test_task_runner->GetPendingTasks().size());
+  EXPECT_EQ(1U, test_task_runner->NumPendingTasks());
 
   task_tracker_.TryCancel(task_id);