Revert of Add a WorkerScheduler and a WebThreadImplForWorker

content/renderer/scheduler/webthread_impl_for_renderer_scheduler_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/webthread_impl_for_renderer_scheduler.h"
-
-#include "base/run_loop.h"
-#include "content/child/scheduler/scheduler_message_loop_delegate.h"
-#include "content/renderer/scheduler/renderer_scheduler_impl.h"
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "third_party/WebKit/public/platform/WebTraceLocation.h"
-
-namespace content {
-namespace {
-
-const int kWorkBatchSize = 2;
-
-class MockTask : public blink::WebThread::Task {
- public:
-  MOCK_METHOD0(run, void());
-};
-
-class MockTaskObserver : public blink::WebThread::TaskObserver {
- public:
-  MOCK_METHOD0(willProcessTask, void());
-  MOCK_METHOD0(didProcessTask, void());
-};
-}  // namespace
-
-class WebThreadImplForRendererSchedulerTest : public testing::Test {
- public:
-  WebThreadImplForRendererSchedulerTest()
-      : scheduler_(SchedulerMessageLoopDelegate::Create(&message_loop_)),
-        default_task_runner_(scheduler_.DefaultTaskRunner()),
-        thread_(&scheduler_) {}
-
-  ~WebThreadImplForRendererSchedulerTest() override {}
-
-  void SetWorkBatchSizeForTesting(size_t work_batch_size) {
-    scheduler_.SetWorkBatchSizeForTesting(work_batch_size);
-  }
-
- protected:
-  void EatDefaultTask(MockTaskObserver* observer) {
-    // The scheduler posts one extra DoWork() task automatically.
-    EXPECT_CALL(*observer, willProcessTask());
-    EXPECT_CALL(*observer, didProcessTask());
-  }
-
-  base::MessageLoop message_loop_;
-  RendererSchedulerImpl scheduler_;
-  scoped_refptr<base::SingleThreadTaskRunner> default_task_runner_;
-  WebThreadImplForRendererScheduler thread_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebThreadImplForRendererSchedulerTest);
-};
-
-TEST_F(WebThreadImplForRendererSchedulerTest, TestTaskObserver) {
-  MockTaskObserver observer;
-  thread_.addTaskObserver(&observer);
-  scoped_ptr<MockTask> task(new MockTask());
-
-  {
-    testing::InSequence sequence;
-    EXPECT_CALL(observer, willProcessTask());
-    EXPECT_CALL(*task, run());
-    EXPECT_CALL(observer, didProcessTask());
-
-    EatDefaultTask(&observer);
-  }
-
-  thread_.postTask(blink::WebTraceLocation(), task.release());
-  message_loop_.RunUntilIdle();
-  thread_.removeTaskObserver(&observer);
-}
-
-TEST_F(WebThreadImplForRendererSchedulerTest, TestWorkBatchWithOneTask) {
-  MockTaskObserver observer;
-  thread_.addTaskObserver(&observer);
-  scoped_ptr<MockTask> task(new MockTask());
-
-  scheduler_.SetWorkBatchSizeForTesting(kWorkBatchSize);
-  {
-    testing::InSequence sequence;
-    EXPECT_CALL(observer, willProcessTask());
-    EXPECT_CALL(*task, run());
-    EXPECT_CALL(observer, didProcessTask());
-
-    EatDefaultTask(&observer);
-  }
-
-  thread_.postTask(blink::WebTraceLocation(), task.release());
-  message_loop_.RunUntilIdle();
-  thread_.removeTaskObserver(&observer);
-}
-
-TEST_F(WebThreadImplForRendererSchedulerTest, TestWorkBatchWithTwoTasks) {
-  MockTaskObserver observer;
-  thread_.addTaskObserver(&observer);
-  scoped_ptr<MockTask> task1(new MockTask());
-  scoped_ptr<MockTask> task2(new MockTask());
-
-  scheduler_.SetWorkBatchSizeForTesting(kWorkBatchSize);
-  {
-    testing::InSequence sequence;
-    EXPECT_CALL(observer, willProcessTask());
-    EXPECT_CALL(*task1, run());
-    EXPECT_CALL(observer, didProcessTask());
-
-    EXPECT_CALL(observer, willProcessTask());
-    EXPECT_CALL(*task2, run());
-    EXPECT_CALL(observer, didProcessTask());
-
-    EatDefaultTask(&observer);
-  }
-
-  thread_.postTask(blink::WebTraceLocation(), task1.release());
-  thread_.postTask(blink::WebTraceLocation(), task2.release());
-  message_loop_.RunUntilIdle();
-  thread_.removeTaskObserver(&observer);
-}
-
-TEST_F(WebThreadImplForRendererSchedulerTest, TestWorkBatchWithThreeTasks) {
-  MockTaskObserver observer;
-  thread_.addTaskObserver(&observer);
-  scoped_ptr<MockTask> task1(new MockTask());
-  scoped_ptr<MockTask> task2(new MockTask());
-  scoped_ptr<MockTask> task3(new MockTask());
-
-  scheduler_.SetWorkBatchSizeForTesting(kWorkBatchSize);
-  {
-    testing::InSequence sequence;
-    EXPECT_CALL(observer, willProcessTask());
-    EXPECT_CALL(*task1, run());
-    EXPECT_CALL(observer, didProcessTask());
-
-    EXPECT_CALL(observer, willProcessTask());
-    EXPECT_CALL(*task2, run());
-    EXPECT_CALL(observer, didProcessTask());
-
-    EXPECT_CALL(observer, willProcessTask());
-    EXPECT_CALL(*task3, run());
-    EXPECT_CALL(observer, didProcessTask());
-
-    EatDefaultTask(&observer);
-  }
-
-  thread_.postTask(blink::WebTraceLocation(), task1.release());
-  thread_.postTask(blink::WebTraceLocation(), task2.release());
-  thread_.postTask(blink::WebTraceLocation(), task3.release());
-  message_loop_.RunUntilIdle();
-  thread_.removeTaskObserver(&observer);
-}
-
-class ExitRunLoopTask : public blink::WebThread::Task {
- public:
-  ExitRunLoopTask(base::RunLoop* run_loop) : run_loop_(run_loop) {}
-
-  virtual void run() { run_loop_->Quit(); }
-
- private:
-  base::RunLoop* run_loop_;
-};
-
-void EnterRunLoop(base::MessageLoop* message_loop, blink::WebThread* thread) {
-  // Note: WebThreads do not support nested run loops, which is why we use a
-  // run loop directly.
-  base::RunLoop run_loop;
-  thread->postTask(blink::WebTraceLocation(), new ExitRunLoopTask(&run_loop));
-  message_loop->SetNestableTasksAllowed(true);
-  run_loop.Run();
-}
-
-TEST_F(WebThreadImplForRendererSchedulerTest, TestNestedRunLoop) {
-  MockTaskObserver observer;
-  thread_.addTaskObserver(&observer);
-
-  {
-    testing::InSequence sequence;
-
-    // One callback for EnterRunLoop.
-    EXPECT_CALL(observer, willProcessTask());
-
-    // A pair for ExitRunLoopTask.
-    EXPECT_CALL(observer, willProcessTask());
-    EXPECT_CALL(observer, didProcessTask());
-
-    // A final callback for EnterRunLoop.
-    EXPECT_CALL(observer, didProcessTask());
-
-    EatDefaultTask(&observer);
-  }
-
-  message_loop_.PostTask(
-      FROM_HERE, base::Bind(&EnterRunLoop, base::Unretained(&message_loop_),
-                            base::Unretained(&thread_)));
-  message_loop_.RunUntilIdle();
-  thread_.removeTaskObserver(&observer);
-}
-
-}  // namespace content