Change const TimeDelta& to TimeDelta in base/task_scheduler/.

base/task_scheduler/scheduler_worker_unittest.cc

Index: base/task_scheduler/scheduler_worker_unittest.cc
diff --git a/base/task_scheduler/scheduler_worker_unittest.cc b/base/task_scheduler/scheduler_worker_unittest.cc
index 22847580e328d163ef93b3d0d33adebcc3f91156..8e82edfba7e8c1d8619ad4d5c9f4224e22de8417 100644
--- a/base/task_scheduler/scheduler_worker_unittest.cc
+++ b/base/task_scheduler/scheduler_worker_unittest.cc
@@ -46,7 +46,7 @@ class SchedulerWorkerDefaultDelegate : public SchedulerWorker::Delegate {
     return nullptr;
   }
   void DidRunTaskWithPriority(TaskPriority task_priority,
-                              const TimeDelta& task_latency) override {
+                              TimeDelta task_latency) override {
     ADD_FAILURE() << "Unexpected call to DidRunTaskWithPriority()";
   }
   void ReEnqueueSequence(scoped_refptr<Sequence> sequence) override {
@@ -186,7 +186,7 @@ class TaskSchedulerWorkerTest : public testing::TestWithParam<size_t> {
     }
 
     void DidRunTaskWithPriority(TaskPriority task_priority,
-                                const TimeDelta& task_latency) override {
+                                TimeDelta task_latency) override {
       AutoSchedulerLock auto_lock(expect_did_run_task_with_priority_lock_);
       EXPECT_TRUE(expect_did_run_task_with_priority_);
       EXPECT_EQ(expected_task_priority_, task_priority);
@@ -391,7 +391,7 @@ class ControllableDetachDelegate : public SchedulerWorkerDefaultDelegate {
   }
 
   void DidRunTaskWithPriority(TaskPriority task,
-                              const TimeDelta& task_latency) override {}
+                              TimeDelta task_latency) override {}
 
   bool CanDetach(SchedulerWorker* worker) override {
     detach_requested_.Signal();