Use ScopedTaskEnvironment instead of MessageLoop

MessageLoop will go away, eventually.

ScopedTaskEnvironment will per default start a ThreadPool, which should
be fine in most of the cases. If you belive your test needs to make sure
that no ThreadPool runs let me know and I will update the patch.

BUG=891670
This CL was uploaded by git cl split.

R=maxmorin@chromium.org

Change-Id: I32710534bd1ce31feda549e8fea8b7e4156c933b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1636355
Auto-Submit: Carlos Caballero <carlscab@google.com>
Reviewed-by: Max Morin <maxmorin@chromium.org>
Commit-Queue: Max Morin <maxmorin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#665064}

media/audio/audio_input_controller_unittest.cc

@@ -7,8 +7,8 @@
 #include <memory>
 
 #include "base/macros.h"
-#include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/timer/timer.h"
 #include "media/audio/audio_manager.h"
 #include "media/audio/fake_audio_input_stream.h"
@@ -144,7 +144,7 @@ class AudioInputControllerTest : public testing::TestWithParam<bool> {
     run_loop.Run();
   }
 
-  base::MessageLoop message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
 
   // Parameterize tests to run AudioInputController either on audio thread
   // (synchronously), or on a different thread (non-blocking).

media/audio/audio_output_proxy_unittest.cc

@@ -9,9 +9,9 @@
 #include <utility>
 
 #include "base/bind.h"
-#include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "media/audio/audio_manager.h"
@@ -488,7 +488,7 @@ class AudioOutputProxyTest : public testing::Test {
     proxy->Close();
   }
 
-  base::MessageLoop message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   MockAudioManager manager_;
   std::unique_ptr<AudioOutputDispatcherImpl> dispatcher_impl_;
   MockAudioSourceCallback callback_;
@@ -511,7 +511,7 @@ class AudioOutputResamplerTest : public AudioOutputProxyTest {
   void OnStart() override {
     // Let Start() run for a bit.
     base::RunLoop run_loop;
-    message_loop_.task_runner()->PostDelayedTask(
+    scoped_task_environment_.GetMainThreadTaskRunner()->PostDelayedTask(
         FROM_HERE, run_loop.QuitClosure(),
         base::TimeDelta::FromMilliseconds(kStartRunTimeMs));
     run_loop.Run();
@@ -824,7 +824,7 @@ TEST_F(AudioOutputResamplerTest, FallbackRecovery) {
   // Once all proxies have been closed, AudioOutputResampler will start the
   // reinitialization timer and execute it after the close delay elapses.
   base::RunLoop run_loop;
-  message_loop_.task_runner()->PostDelayedTask(
+  scoped_task_environment_.GetMainThreadTaskRunner()->PostDelayedTask(
       FROM_HERE, run_loop.QuitClosure(),
       base::TimeDelta::FromMilliseconds(2 * kTestCloseDelayMs));
   run_loop.Run();

media/audio/audio_system_impl_unittest.cc

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 #include "media/audio/audio_system_impl.h"
-#include "base/message_loop/message_loop.h"
+#include "base/test/scoped_task_environment.h"
 #include "media/audio/audio_system_test_util.h"
 #include "media/audio/audio_thread_impl.h"
 #include "media/audio/mock_audio_manager.h"
@@ -35,7 +35,7 @@ class AudioSystemImplTestBase : public testing::Test {
   MockAudioManager* audio_manager() { return audio_manager_.get(); }
   AudioSystem* audio_system() { return audio_system_.get(); }
 
-  base::MessageLoop message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   std::unique_ptr<MockAudioManager> audio_manager_;
   std::unique_ptr<AudioSystem> audio_system_;
   // AudioSystemTester tester_;

media/audio/mac/audio_device_listener_mac_unittest.cc

@@ -11,9 +11,9 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/macros.h"
-#include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
+#include "base/test/scoped_task_environment.h"
 #include "media/base/bind_to_current_loop.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -25,7 +25,7 @@ class AudioDeviceListenerMacTest : public testing::Test {
   AudioDeviceListenerMacTest() {
     // It's important to create the device listener from the message loop in
     // order to ensure we don't end up with unbalanced TaskObserver calls.
-    message_loop_.task_runner()->PostTask(
+    scoped_task_environment_.GetMainThreadTaskRunner()->PostTask(
         FROM_HERE,
         base::BindOnce(&AudioDeviceListenerMacTest::CreateDeviceListener,
                        base::Unretained(this)));
@@ -35,7 +35,7 @@ class AudioDeviceListenerMacTest : public testing::Test {
   virtual ~AudioDeviceListenerMacTest() {
     // It's important to destroy the device listener from the message loop in
     // order to ensure we don't end up with unbalanced TaskObserver calls.
-    message_loop_.task_runner()->PostTask(
+    scoped_task_environment_.GetMainThreadTaskRunner()->PostTask(
         FROM_HERE,
         base::BindOnce(&AudioDeviceListenerMacTest::DestroyDeviceListener,
                        base::Unretained(this)));
@@ -98,7 +98,7 @@ class AudioDeviceListenerMacTest : public testing::Test {
   MOCK_METHOD0(OnDeviceChange, void());
 
  protected:
-  base::MessageLoop message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   std::unique_ptr<AudioDeviceListenerMac> device_listener_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioDeviceListenerMacTest);

media/audio/mac/audio_low_latency_input_mac_unittest.cc

@@ -9,9 +9,9 @@
 #include "base/bind.h"
 #include "base/environment.h"
 #include "base/memory/ptr_util.h"
-#include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/test/test_timeouts.h"
 #include "base/threading/platform_thread.h"
 #include "media/audio/audio_device_description.h"
@@ -33,9 +33,9 @@ using ::testing::NotNull;
 
 namespace media {
 
-ACTION_P4(CheckCountAndPostQuitTask, count, limit, loop, closure) {
+ACTION_P4(CheckCountAndPostQuitTask, count, limit, task_runner, closure) {
   if (++*count >= limit) {
-    loop->task_runner()->PostTask(FROM_HERE, closure);
+    task_runner->PostTask(FROM_HERE, closure);
   }
 }
 
@@ -113,7 +113,8 @@ class WriteToFileAudioSink : public AudioInputStream::AudioInputCallback {
 class MacAudioInputTest : public testing::Test {
  protected:
   MacAudioInputTest()
-      : message_loop_(base::MessageLoop::TYPE_UI),
+      : scoped_task_environment_(
+            base::test::ScopedTaskEnvironment::MainThreadType::UI),
         audio_manager_(AudioManager::CreateForTesting(
             std::make_unique<TestAudioThread>())) {
     // Wait for the AudioManager to finish any initialization on the audio loop.
@@ -158,7 +159,7 @@ class MacAudioInputTest : public testing::Test {
 
   void OnLogMessage(const std::string& message) { log_message_ = message; }
 
-  base::MessageLoop message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   std::unique_ptr<AudioManager> audio_manager_;
   std::string log_message_;
 };
@@ -217,7 +218,8 @@ TEST_F(MacAudioInputTest, AUAudioInputStreamVerifyMonoRecording) {
   base::RunLoop run_loop;
   EXPECT_CALL(sink, OnData(NotNull(), _, _))
       .Times(AtLeast(10))
-      .WillRepeatedly(CheckCountAndPostQuitTask(&count, 10, &message_loop_,
+      .WillRepeatedly(CheckCountAndPostQuitTask(
+          &count, 10, scoped_task_environment_.GetMainThreadTaskRunner(),
           run_loop.QuitClosure()));
   ais->Start(&sink);
   run_loop.Run();
@@ -252,7 +254,8 @@ TEST_F(MacAudioInputTest, AUAudioInputStreamVerifyStereoRecording) {
   base::RunLoop run_loop;
   EXPECT_CALL(sink, OnData(NotNull(), _, _))
       .Times(AtLeast(10))
-      .WillRepeatedly(CheckCountAndPostQuitTask(&count, 10, &message_loop_,
+      .WillRepeatedly(CheckCountAndPostQuitTask(
+          &count, 10, scoped_task_environment_.GetMainThreadTaskRunner(),
           run_loop.QuitClosure()));
   ais->Start(&sink);
   run_loop.Run();

media/audio/win/audio_low_latency_input_win_unittest.cc

@@ -15,11 +15,11 @@
 #include "base/environment.h"
 #include "base/files/file_util.h"
 #include "base/macros.h"
-#include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/test/test_timeouts.h"
 #include "base/win/scoped_com_initializer.h"
 #include "media/audio/audio_device_description.h"
@@ -268,7 +268,7 @@ class WinAudioInputTest : public ::testing::Test {
   ~WinAudioInputTest() override { audio_manager_->Shutdown(); }
 
  protected:
-  base::MessageLoop message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   std::unique_ptr<AudioManager> audio_manager_;
 };
 
@@ -413,8 +413,8 @@ TEST_F(WinAudioInputTest, WASAPIAudioInputStreamTestPacketSizes) {
     base::RunLoop run_loop;
     EXPECT_CALL(sink, OnData(NotNull(), _, _))
         .Times(AtLeast(10))
-        .WillRepeatedly(
-            CheckCountAndPostQuitTask(&count, 10, message_loop_.task_runner(),
+        .WillRepeatedly(CheckCountAndPostQuitTask(
+            &count, 10, scoped_task_environment_.GetMainThreadTaskRunner(),
             run_loop.QuitWhenIdleClosure()));
     ais->Start(&sink);
     run_loop.Run();
@@ -438,8 +438,8 @@ TEST_F(WinAudioInputTest, WASAPIAudioInputStreamTestPacketSizes) {
     base::RunLoop run_loop;
     EXPECT_CALL(sink, OnData(NotNull(), _, _))
         .Times(AtLeast(10))
-        .WillRepeatedly(
-            CheckCountAndPostQuitTask(&count, 10, message_loop_.task_runner(),
+        .WillRepeatedly(CheckCountAndPostQuitTask(
+            &count, 10, scoped_task_environment_.GetMainThreadTaskRunner(),
             run_loop.QuitWhenIdleClosure()));
     ais->Start(&sink);
     run_loop.Run();
@@ -459,8 +459,8 @@ TEST_F(WinAudioInputTest, WASAPIAudioInputStreamTestPacketSizes) {
     base::RunLoop run_loop;
     EXPECT_CALL(sink, OnData(NotNull(), _, _))
         .Times(AtLeast(10))
-        .WillRepeatedly(
-            CheckCountAndPostQuitTask(&count, 10, message_loop_.task_runner(),
+        .WillRepeatedly(CheckCountAndPostQuitTask(
+            &count, 10, scoped_task_environment_.GetMainThreadTaskRunner(),
             run_loop.QuitWhenIdleClosure()));
     ais->Start(&sink);
     run_loop.Run();

media/audio/win/audio_output_win_unittest.cc

@@ -12,9 +12,9 @@
 #include "base/base_paths.h"
 #include "base/memory/aligned_memory.h"
 #include "base/memory/ptr_util.h"
-#include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/sync_socket.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/time/time.h"
 #include "base/win/scoped_com_initializer.h"
 #include "media/audio/audio_device_info_accessor_for_tests.h"
@@ -164,7 +164,7 @@ class WinAudioTest : public ::testing::Test {
   ~WinAudioTest() override { audio_manager_->Shutdown(); }
 
  protected:
-  base::MessageLoop message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   std::unique_ptr<AudioManager> audio_manager_;
   std::unique_ptr<AudioDeviceInfoAccessorForTests> audio_manager_device_info_;
 };