scheduler: Remove task observer shenanigans

components/scheduler/child/task_queue_manager_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/scheduler/child/task_queue_manager.h"
 
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/test/simple_test_tick_clock.h"
 #include "base/threading/thread.h"
@@ skipping 984 matching lines @@
   manager_->SetWorkBatchSize(2);
   manager_->AddTaskObserver(&observer);
 
   std::vector<int> run_order;
   scoped_refptr<base::SingleThreadTaskRunner> runner =
       manager_->TaskRunnerForQueue(0);
 
   runner->PostTask(FROM_HERE, base::Bind(&TestTask, 1, &run_order));
   runner->PostTask(FROM_HERE, base::Bind(&TestTask, 2, &run_order));
 
-  // Two pairs of callbacks for the tasks above plus another one for the
-  // DoWork() posted by the task queue manager.
-  EXPECT_CALL(observer, WillProcessTask(_)).Times(3);
-  EXPECT_CALL(observer, DidProcessTask(_)).Times(3);
+  EXPECT_CALL(observer, WillProcessTask(_)).Times(2);
+  EXPECT_CALL(observer, DidProcessTask(_)).Times(2);
   message_loop_->RunUntilIdle();
 }
 
 TEST_F(TaskQueueManagerTest, TaskObserverRemoving) {
   InitializeWithRealMessageLoop(1u, SelectorType::Automatic);
   MockTaskObserver observer;
   manager_->SetWorkBatchSize(2);
   manager_->AddTaskObserver(&observer);
   manager_->RemoveTaskObserver(&observer);
 
@@ skipping 307 matching lines @@
   runner->PostDelayedTaskAt(FROM_HERE, base::Bind(&TestTask, 4, &run_order),
                             runTime4);
 
   now_src_->Advance(2 * delay);
   test_task_runner_->RunUntilIdle();
 
   EXPECT_THAT(run_order, ElementsAre(1, 2, 3, 4));
 }
 
 }  // namespace scheduler