Move throttling of background timers into the renderer scheduler

components/scheduler/base/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/base/task_queue_manager.h"
 
 #include "base/location.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/test/simple_test_tick_clock.h"
@@ skipping 215 matching lines @@
 
 TEST_F(TaskQueueManagerTest, DelayedTaskPosting) {
   Initialize(1u);
 
   std::vector<int> run_order;
   base::TimeDelta delay(base::TimeDelta::FromMilliseconds(10));
   runners_[0]->PostDelayedTask(FROM_HERE, base::Bind(&TestTask, 1, &run_order),
                                delay);
   EXPECT_EQ(delay, test_task_runner_->DelayToNextTaskTime());
   EXPECT_TRUE(runners_[0]->IsQueueEmpty());
+  EXPECT_TRUE(runners_[0]->HasPendingDelayedTask());
   EXPECT_TRUE(run_order.empty());
 
   // The task doesn't run before the delay has completed.
   test_task_runner_->RunForPeriod(base::TimeDelta::FromMilliseconds(9));
   EXPECT_TRUE(run_order.empty());
 
   // After the delay has completed, the task runs normally.
   test_task_runner_->RunForPeriod(base::TimeDelta::FromMilliseconds(1));
   EXPECT_THAT(run_order, ElementsAre(1));
+  EXPECT_FALSE(runners_[0]->HasPendingDelayedTask());
 }
 
 bool MessageLoopTaskCounter(size_t* count) {
   *count = *count + 1;
   return true;
 }
 
 TEST_F(TaskQueueManagerTest, DelayedTaskExecutedInOneMessageLoopTask) {
   Initialize(1u);
 
@@ skipping 840 matching lines @@
                                delay1);
   runners_[1]->PostDelayedTask(FROM_HERE, base::Bind(&TestTask, 2, &run_order),
                                delay2);
 
   now_src_->Advance(delay1 * 2);
   test_task_runner_->RunUntilIdle();
 
   EXPECT_THAT(run_order, ElementsAre(2, 1));
 }
 
-TEST_F(TaskQueueManagerTest, DelayedTaskWithAbsoluteRunTime) {
-  Initialize(1u);
-
-  // One task in the past, two with the exact same run time and one in the
-  // future.
-  base::TimeDelta delay = base::TimeDelta::FromMilliseconds(10);
-  base::TimeTicks runTime1 = now_src_->NowTicks() - delay;
-  base::TimeTicks runTime2 = now_src_->NowTicks();
-  base::TimeTicks runTime3 = now_src_->NowTicks();
-  base::TimeTicks runTime4 = now_src_->NowTicks() + delay;
-
-  std::vector<int> run_order;
-  runners_[0]->PostDelayedTaskAt(
-      FROM_HERE, base::Bind(&TestTask, 1, &run_order), runTime1);
-  runners_[0]->PostDelayedTaskAt(
-      FROM_HERE, base::Bind(&TestTask, 2, &run_order), runTime2);
-  runners_[0]->PostDelayedTaskAt(
-      FROM_HERE, base::Bind(&TestTask, 3, &run_order), runTime3);
-  runners_[0]->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));
-}
-
 void CheckIsNested(bool* is_nested) {
   *is_nested = base::MessageLoop::current()->IsNested();
 }
 
 void PostAndQuitFromNestedRunloop(base::RunLoop* run_loop,
                                   base::SingleThreadTaskRunner* runner,
                                   bool* was_nested) {
   base::MessageLoop::ScopedNestableTaskAllower allow(
       base::MessageLoop::current());
   runner->PostTask(FROM_HERE, run_loop->QuitClosure());
@@ skipping 174 matching lines @@
 
   scoped_refptr<internal::TaskQueueImpl> task_queue =
       manager_->NewTaskQueue(TaskQueue::Spec("test_queue"));
 
   EXPECT_CALL(observer, OnUnregisterTaskQueue(_)).Times(1);
   task_queue->UnregisterTaskQueue();
 
   manager_->SetObserver(nullptr);
 }
 
-TEST_F(TaskQueueManagerTest, ScheduleDelayedWorkIsNotReEntrant) {
-  Initialize(1u);
-
-  // Post two tasks into the past. The second one used to trigger a deadlock
-  // because it tried to re-entrantly wake the first task in the same queue.
-  runners_[0]->PostDelayedTaskAt(
-      FROM_HERE, base::Bind(&NullTask),
-      base::TimeTicks() + base::TimeDelta::FromMicroseconds(100));
-  runners_[0]->PostDelayedTaskAt(
-      FROM_HERE, base::Bind(&NullTask),
-      base::TimeTicks() + base::TimeDelta::FromMicroseconds(200));
-  test_task_runner_->RunUntilIdle();
-}
-
 void HasOneRefTask(std::vector<bool>* log, internal::TaskQueueImpl* tq) {
   log->push_back(tq->HasOneRef());
 }
 
 TEST_F(TaskQueueManagerTest, UnregisterTaskQueueInNestedLoop) {
   InitializeWithRealMessageLoop(1u);
 
   // We retain a reference to the task queue even when the manager has deleted
   // its reference.
   scoped_refptr<internal::TaskQueueImpl> task_queue =
@@ skipping 126 matching lines @@
   for (int i = 1; i < 100; i++) {
     runners_[0]->PostDelayedTask(
         FROM_HERE,
         base::Bind(&ChromiumRunloopInspectionTask, test_task_runner_),
         base::TimeDelta::FromMilliseconds(i));
   }
   test_task_runner_->RunUntilIdle();
 }
 
 }  // namespace scheduler