Move blink scheduler implementation into a component

content/renderer/scheduler/deadline_task_runner_unittest.cc

-// Copyright 2015 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 "content/renderer/scheduler/deadline_task_runner.h"
-
-#include "cc/test/ordered_simple_task_runner.h"
-#include "cc/test/test_now_source.h"
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace content {
-
-class DeadlineTaskRunnerTest : public testing::Test {
- public:
-  DeadlineTaskRunnerTest() {}
-  ~DeadlineTaskRunnerTest() override {}
-
-  void SetUp() override {
-    clock_ = cc::TestNowSource::Create(5000);
-    mock_task_runner_ = new cc::OrderedSimpleTaskRunner(clock_, true);
-    deadline_task_runner_.reset(new DeadlineTaskRunner(
-        base::Bind(&DeadlineTaskRunnerTest::TestTask, base::Unretained(this)),
-        mock_task_runner_));
-    run_times_.clear();
-  }
-
-  bool RunUntilIdle() { return mock_task_runner_->RunUntilIdle(); }
-
-  void TestTask() { run_times_.push_back(clock_->Now()); }
-
-  scoped_refptr<cc::TestNowSource> clock_;
-  scoped_refptr<cc::OrderedSimpleTaskRunner> mock_task_runner_;
-  scoped_ptr<DeadlineTaskRunner> deadline_task_runner_;
-  std::vector<base::TimeTicks> run_times_;
-};
-
-TEST_F(DeadlineTaskRunnerTest, RunOnce) {
-  base::TimeTicks start_time = clock_->Now();
-  base::TimeDelta delay = base::TimeDelta::FromMilliseconds(10);
-  deadline_task_runner_->SetDeadline(FROM_HERE, delay, clock_->Now());
-  RunUntilIdle();
-
-  EXPECT_THAT(run_times_, testing::ElementsAre(start_time + delay));
-};
-
-TEST_F(DeadlineTaskRunnerTest, RunTwice) {
-  base::TimeDelta delay1 = base::TimeDelta::FromMilliseconds(10);
-  base::TimeTicks deadline1 = clock_->Now() + delay1;
-  deadline_task_runner_->SetDeadline(FROM_HERE, delay1, clock_->Now());
-  RunUntilIdle();
-
-  base::TimeDelta delay2 = base::TimeDelta::FromMilliseconds(100);
-  base::TimeTicks deadline2 = clock_->Now() + delay2;
-  deadline_task_runner_->SetDeadline(FROM_HERE, delay2, clock_->Now());
-  RunUntilIdle();
-
-  EXPECT_THAT(run_times_, testing::ElementsAre(deadline1, deadline2));
-};
-
-TEST_F(DeadlineTaskRunnerTest, EarlierDeadlinesTakePrecidence) {
-  base::TimeTicks start_time = clock_->Now();
-  base::TimeDelta delay1 = base::TimeDelta::FromMilliseconds(1);
-  base::TimeDelta delay10 = base::TimeDelta::FromMilliseconds(10);
-  base::TimeDelta delay100 = base::TimeDelta::FromMilliseconds(100);
-  deadline_task_runner_->SetDeadline(FROM_HERE, delay100, clock_->Now());
-  deadline_task_runner_->SetDeadline(FROM_HERE, delay10, clock_->Now());
-  deadline_task_runner_->SetDeadline(FROM_HERE, delay1, clock_->Now());
-
-  RunUntilIdle();
-
-  EXPECT_THAT(run_times_, testing::ElementsAre(start_time + delay1));
-};
-
-TEST_F(DeadlineTaskRunnerTest, LaterDeadlinesIgnored) {
-  base::TimeTicks start_time = clock_->Now();
-  base::TimeDelta delay100 = base::TimeDelta::FromMilliseconds(100);
-  base::TimeDelta delay10000 = base::TimeDelta::FromMilliseconds(10000);
-  deadline_task_runner_->SetDeadline(FROM_HERE, delay100, clock_->Now());
-  deadline_task_runner_->SetDeadline(FROM_HERE, delay10000, clock_->Now());
-
-  RunUntilIdle();
-
-  EXPECT_THAT(run_times_, testing::ElementsAre(start_time + delay100));
-};
-
-TEST_F(DeadlineTaskRunnerTest, DeleteDeadlineTaskRunnerAfterPosting) {
-  deadline_task_runner_->SetDeadline(
-      FROM_HERE, base::TimeDelta::FromMilliseconds(10), clock_->Now());
-
-  // Deleting the pending task should cancel it.
-  deadline_task_runner_.reset(nullptr);
-  RunUntilIdle();
-
-  EXPECT_TRUE(run_times_.empty());
-};
-
-}  // namespace content